How to Clean and Polish Metal to Mirror Finish
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- Опубліковано 6 гру 2016
- Simple How to Clean and Polish Metal to a Mirror Finish
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How to Clean a Vintage Bike Frame • How to clean and resto...
In this short video I take you through four simple steps that I use to clean and Polish the metal components in the restoration projects that I do.
STEP 1 Cleaning 0.34
STEP 2 Sanding 0.55
STEP 3 Polishing 1.26
STEP 4 More Polishing and Buffing 1.54
I hope that it helps you in your own projects!
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Thanks for watching and please Subscribe...Andy - Навчання та стиль
Hi and thanks for a really good channel ! Very inspiring :)
I have a question: I have a steel frame which I would like some parts to be chrome (fork for example). But it's painted at the moment - is it possible to get rid of the paint and polish it up to mirror finish? :)
Thanks !
Hello and thanks for the words of support. Regarding a chrome finish, all paint has to be removed and dipping can be extremely expensive. So regarding can a steel frame be polish up, I suppose it can but I would say it’s going to be ALOT of work. You are also going to maybe lacquer it also to protect the frame. I hope this helps Andy
Hi Andy and thanks a lot for your answer! I think I will give it a shot and see what happens. Watched this video (ua-cam.com/video/iyf6-JXVork/v-deo.html) and thought I could problably do the same process for my bike frame also. Thanks again!
Keep me post Id love to see the results
BikeIt UK hi mate where do you buy you polishing wheels from for the bench grinder I’m in the Uk myself thanks in advance
@@westmidlandslandscaping6885 I would love this info as well!
Thanks a million Andy, am in the process of restoring a 30 year old Dawes Galaxy and your videos are seriously helpful. Top man.
Great to hear your involved saving a Dawes Galaxy. Thanks for the support, enjoy 😉👍
You kept your word! Thanks a lot once again for great and very helpful video.
Many more to come like this and a few Bike projects as well in the pipe line. Happy you like all the best Andy
well worth buying got my bench grinder with the kit a couple of days ago wouldn't have known how to use it with the instructions provided. great results. thanks mate made it a lot easier
Fantastic, really happy the video helps and that you are enjoying the results. All the best Andy
in 3 days i learn so much with you much respect from Chile!.. i have a Raleigh Carlton Grand Prix for my restauration
This is good to hear I am very happy the videos have helped you 👍
Hi mate just want to say that your channel is excellent. This video in particular, in addition to all the comments and your regular replies to them have helped me no end in my new found hobby of restoring vintage bikes. Massive respect and appreciation. Cheers :).
Sorry for the late reply, thank you so much for such a supporting comment 👍 Comments like that believe it or not inspire me to carry on. So without you guys it wouldn’t exist. Keep saving and restoring, all the very best to you 😉Andy
@@BikeItUK Cheers for the reply mate and keep up the replying. So many people never reply and you really can't put a prive on having that bit of extra personality and connection with your viewers. I can tell you're a good lad and I wish you all the very best :).
Great video! Looking for something like this for a long time!
Great stuff, I hope that it helps you out in your own polishing projects. All the very best Andy
Excellent video, thanks very much for posting, I shall bear this in mind next time I am working with aluminium parts :)
Hi Andy,
I love to watch your instructions. They seem the most informative of all bike restorations on youtube to me :)
But just a little safety thing - you especially with fast turning wheels or tools you shouldn't wear gloves. They get caught easier than the hand itself (one of the first things i learned as a mechanic).
:) keep up the good work!
Great stuff, looking forward to trying this out. I've used the techniques for jewelry, never thought of scaling them up for bike parts!
+genghisbunny thanks for the comment and tuning in. 👍all the best and hope all goes well with the polishing Andy
Excellent mirror finished parts... 👍
Thanks again for the support 👍
Super useful video. Thanks mate!
Thanks for watching 👍
you're the best! greetings from Italy :)
+Ro Ck 👍many thanks 🙏🏻 Andy
Hello!!Thank so much is perfect 👌🏻 the work finished..Simple and easy I’ll be working the components of my bike in base to the video.👍🏻🤜🏻🤛🏻
Really happy the video How to polish metal has help thanks for your support 👍
Thank you Andy , 2 items on my list that u mentioned the bench and the hand grinders :)great video !! ps, nice glasses, look like a rock star ;)
+Nauj Aral ha ha thanks buddy...not sure about the Rock Star ⭐️ bit! Be warned the bench grinder is very addictive you can loose hours of your life. Hope you have a great Christmas pal all the best Andy
BikeIt UK oh I bet but I do it by hand rigth now so doesn't come as good, so it's a good thing to have, thanks for the Christmas 🎄 wishes and reciprocally to you and yours
Thanks, good information. It's an enjoyable process giving old parts a facelift.
Glad you enjoyed it I hope it helps
@@BikeItUK It certianly did. Your videos are fantastic.
Excelente trabajo sr. Andy siga así y esperó suba pronto otro vídeo de restauración felicidades saludos de México
Feliz que disfrutes mucho más videos aún por venir. Gracias de nuevo Andy
thanks a lot, I followed these steps and got really good results with a Shimano 600 crankset.
Glad the video helped 👍
Amazing job!
+Alejandro Macedo thanks for the comment and watching
Spot onnn very informative thanx mate 👍
+sameer khan Happy it's helped you. All the best Andy
Someone once said: "Rise and shine". And some did! Nice work. However, there are two schools : the high polish school, and the more subdued, which can be quite refined too. I did nearly thirty five years of antique furniture restoration, including nearly thirty in Paris. It provided me with an insight into the difference between shine, and glitter. However, you got your joeys into lovely shape, and I believe that a properly polished chainset and cranks are more water repellent. Good advice would be to degrease with meths or so, and then clear laquer to protect- and prolong- the finish. Good work.
+musamor75 thanks again for watching, and on this one, the advice. It really is a two way street the videos and the channel thank you for the advice 👍🚴 all the very best Andy
Gotta get me a bench grinder. The results are wonderful.
+xMrsmileyfacex yes I cannot go in the garage now without turning the thing on and having a little go...very addictive and rewarding. Thx Andy
awesome job also what grit sand paper did u use start out with i want to clean polish and remove the stratches off my shimano ultegra crankset
Great job!
Thanks for the support I hope this helps 👍
shiny shiny ! Well done thank you
+Velofil thanks for the comment and support all the best Andy
good video, I've always wanted to strip the paint off of a frame and finish the entire frame like this, then apply a clear coat. I'd love to see you do a resto like that.
+xenimaging thanks for the comment I'll put it on the list 👍
WOW! look amazing
Thanks for watching and the support I hope the video was helpful
Muito bom seu vídeo, era exatamente o que eu precisava para meu trabalho de usinagem, like, like, like
Nice Video!!!!
Thanks for the comment and watching Andy
2:40 I'm always leery about wearing gloves when using grinders or buffers. I know someone whose glove got caught in the wheel and he got badly injured. If you do this you need to be very, very careful.
3:31 Also, it's better to use the lower front quarter of the wheel rather than the top, since that way it's less likely to throw the part in your face if you lose your grip on it.
Thanks for watching and also your advice, much appreciated 👍
Hello. Great video, but I have a question. What exactly are the hard, green and softer compunds, so I can buy them? Also, I've been trying to get the polish finish, but in my bench grinder I only have the softer compound & wheel, so I couldnt really make it work out. Appreciate the video!
This is the vidéo I was waiting for !!!
+bapt2509 fantastic hope it helps. All the very best Andy
Thank you!
Hope the video helped 👍
great job sir, i need this tutorial for my project hehe 👍 rgrds
Thanks very much for the comment I hope that it helps all the best Andy
Thanks for this and all your other videos!! You make all bikes look like jewels. Do you think a similar result could be possible when polishing with a cordless screwdriver and some car-wheel polishing pads?
Definitely....you may need a few rechargeable batteries though, good luck and thanks for watching and your support
Just subscribed, and really enjoy your infectious enthusiasm. I have a late 80's Masi I brought to France from Texas, an 80 or so Rigi, and an early 80's Pinarello I have all built up. I get that same smile on my face you do when I build and ride. Could you send links to where I can get the polishing compounds and wheels you use? Thanks.
Thanks Mark for your support and watching sounds like you have some very sweet rides yourself. Regarding the polishing wheels etc I used Metal Polishing Supplies I hope this helps all the very best
Hi Andy
How you prevent the strain of the metal after the polish?.Even a drop of water leaves stain to the polished metal
The result of that polishing was very shiny indeed!
I wonder if in some restorations you might not polish so much to keep a more original look and avoid what some call “over-restoring”?
Great video. I always enjoy your videos.
Thanks for the comment and Im happy you enjoy the videos. Regarding the polishing I think it depends on the groups and the value of the bike. On many I have simply just cleaned the groups, however on the Shimano Gold Arrow group I knew how well it cleaned and polished up. Thanks again and all the best Andy
That buffing wheel sure is nice. What's a good brand, a Baldor?
thx bro
sir can i ask what does it called in the bar did you use for bench grinder
I love your video! Do you have any tips on how to grind off logo markings made the manufacturer? Thanks!
Hi thanks for watching! Regarding removing logos etc it’s done in the same way. Start off by sanding off the logo, then follow these steps to polish the piece back up. I did exactly this is the Colnago Master project which can be found on my channel. I hope this helps all the best and good luck 😉👍
Cool!
+Luis Eduardo Sandoval Barajas thanks for watching all the best Andy
Very nice video's, really enjoy them.
Should this work on some vintage brake levers too (shimano 600) ?
+I Like Diy the old series yes. Glad you like the videos and I hope they help you in your own projects 👍
Question, why do I see some people polish using 200-1000 grit sandpaper and then polish it with compound after? I see videos like this with only one size grit paper and then go straight to polishing without the slight climb in grit sizes.
Thank you for this informative video! Worthy to be subscribed! May I know the name and specs of those spinning hairy wheels?
Thanks for the sub! To be honest I’m not a 100% sure. I think it’s corse, medium and fine. 🤔
Thank you so much for this video! May I ask what are the recommended ways for rust proofing a cromoly bike fork while retaining a polished mirror finish?
Thanks for watching, you can buy products to lacquer and protect the final finish. just search Metal Clear Lacquer I hope that this helps. All the best and happy polishing
Hi, nice video.
I'm going to polish my stem and handlebars, but my handlebar has a trademark right on the front.
Can I apply sandpaper/bench grinder/drill on it (step 4)? of without damage it.
By the way, I've been following your channel and it's very helpful. Definitely I'll use all these tips on my own project.
thank you very much!
If the component has a printed logo area then it’s worth avoiding and protecting this. Thanks for the comment and support. 😉👍🚲
THANK YOU so much for replying to my question, u have helped me soooo much!!
Another question: I have a 1999 Peugeot Paris bike. Very nice shape, curious if u could give me a rough idea of what they are worth??
THANKS again.
+dave hale Hello again all I would say is try and find the Model in the brochures see where it ranked. I'm currently working on the website which includes many vintage brochures. Andy
good job
+gigA jvania thanks my friend 👍
I would love for the components to come out from factory polished again [like D-ace 7700] or Record in 90ties .
Yes agree something very special about this time period of bicycles in general 👍thanks for watching and tuning in all the best Andy
Excellent video. Doing up my old Peugeot while in lockdown, & found this very encouraging. Do you have to have a dedicated bench grinder for the polishing ,or can you adapt a grinder that has a heavy grinding wheel(for sharpening chisels etc)? BTW , is that a Salford accent? Many thanks. Subscribed.
Thanks for watching and also Subscribing. The accent is Stockport way but I spent a few years in the Royal Navy as a younger days so that may have influenced my accent. Regarding the grinder I do have a dedicated bench one, however before this I did just use my hand drill which got me going. Great to hear your getting Involved restoring and cleaning the bike up. I find it very rewarding. Thanks again for your support enjoy and stay safe 👍🚲
Those are amazing results. I've seen that process used before on auto parts.They called it Lineshing? I'm not sure how to spell it. I was looking for auto correct to help me out. Thanks Andy. Merry Christmas.
Hi yes I am the same I couldn't operate without auto correct ha ha. No worries Merry Christmas to you also, hope that you have a good one. All the best Andy
Regards from Czech! Very nice job on polishing crank set, tried to polish my shimano arrow vintage bit wasnt so succesful. What was the last think you put on the polishing wheel, white one I mean, at 3:30? Thanks and keep posting such a nice videos!
Thanks for the comment and sorry for the late reply yes the last colour was white. I hope you have better success with more polishing metal. All the very best Andy
muy bueno! I need more steps, I used 80, 100, 400 and 2000 sandpaper with water, but this is awesome.
Te gustan los pasos, cosas grandes mucho más que venir la promesa, mira este espacio. Gracias por mirar y comentar todo lo mejor Andy
BikeIt UK Say there Andy, didn't know you knew Spanish. You're quite a card, aren't you? Good man. Sei molto bravo amico! Invece questo è Italiano, ma si puo capire facilmente.
yo también hago más pasos ,lo hago a mano y queda hecho un espejo , después de la lija fina ,le paso lija fina con pasta de pulir metales ,después esponja de acero fina ,luego el mismo tipo de esponja con pasta y por último la pasta con un paño suave de algodón .
Familia Castro 400 to 2000 is pointless. 400 will begin to polish it but it’s still quite abrasive. 2000 grit is in the territory of crocus cloth. You won’t maximize its potential from 400-2000. I would recommend for a mirror finish 400, scotch brite, 600, 800, 1000, 1500, crocus cloth. Take it to a nylon buffing wheel, then finish it with a white polishing wheel with polishing paste. Wipe off the excess with a microfiber towel. You will have a ridiculous mirror finish if you do that.
Familia Castro forgot to mention.. depending on what you are working on if it has small grooves or is oddly shaped. Use a rotary dremel. You can use the cone shaped tips to buff and polish tough to get to spots. I know you posted this a year ago but hope this helps in future projects.
Another video of how to use decals if they needed
Good idea thanks for the suggestion
How do you keep the aluminum from oxydizing?
Fuck me that was a seriously in-depth vid man, inspired!!!!!
Great video. Thank you. I’ve seen some people clean the part with oven cleaner to get rid of the anodizing and then polish it. What is the difference with your method? Which one last longer? Thank you
Great tip! The anodising is normally sanded off but I will try your tip thanks for watching and the comment
"With a nice clean rag"
Or a shirt rag covered in oil and grease works fine lol
Awesome video btw
Thanks for watching and the support
How do you make alloy metal shine again
where can you obtain these different rubbing compounds, great video by the way
+Allan Williams hi I just bought mine online search metal polishing products. That should bring a load up. All the best Andy
Great video. Thank you. What do you think about using 2K clearcoat to protect polished surface? Is it good idea? I am not shure if the coat would stick to the surface. Thank you for reply.
Honestly I’ve never used it. Does sound a good idea. To be honest I’ve never had a problem with the polished parts either. Good luck 👍
Hi Andy, how do you protect items like this once you have finished the polishing?
Also loving this channel, currently doing up an old 531 and making a campagnolo track bike, your videos have been extremely useful and enjoyable.
Thanks for watching and the support, I personally don’t use any other product. I have components I polished over 5 years ago still looking great. My personal opinion it’s easier to buff up rather than removing a protective top coat. I hope this helps. The track bike sounds nice 👍 all the best
@@BikeItUK perfect thanks for that mate 👍🏼
nice video, maybe I should do my whole bike. Just wanted to say that I was always taught not too wear gloves when operating rotating machinery as it can be more dangerous if it gets caught up. wearing no gloves you might get cut but will instinctively pull away.
Thanks for the comment glad you enjoyed the video. Debatable regarding the gloves. I lost the tip of a finger to a belt sander once without gloves, I understand exactly where you are coming from. Hmm got me thinking, I am a Fire Fighter full time so I calculate risk a bit in my line of work! They are very loose fitting and with open wheels have little or no snagging points, so I would say the protection out ways the risk to getting caught up. A belt sander however is a different risk all together. Thanks again Andy
Got me to thinking. Thanks for that advice even though not directed to me. I will adhere though, cause it make a lot of sense. Thanks again.
Great video. What exactly are the color things you are using for the last step? Thanks, Alex
Thanks for watching and happy you like. the colour bars are coarse abrasive compounds. They are different grades that's all. I hope this answers your question. All the best Andy
On steels don't use brown , it's tripoli. Soft metals compound.
In the polishing trade colours are a guide only, most manufacturers use dyes in compounds. Fro example Menzerna have a white medium compound and white super finish, they also gave a green heaver cutter and a green medium
Thanks for your knowledge and support much appreciated 👍
Thx for sharing.
Do I use chrome polish on chromoly frames?
I would suggest so
Hi Andy. For smaller parts eg derailleurs would you still sand down even if not scratched, or simply wash and go directly to metal polish? Thank you for your help.
+DavidUKesb Hi David exactly that the sanding is only for removing scratches 👍good luck enjoy 😉
Great video as allways.
Do you know how to protect a raw steel frame from rust? Stripped down an old frame, because the paintjob was awfull and like the raw look.
I did a Raleigh Trent video with the exact thing you are on about check it out. I sprayed a clear coat on it. All the best Andy
BikeIt UK Thank you ! So nice that you actually reply to comments :-)
شكرا مقدما
ليس هناك أى مشكلة
Obviously you know more about this than me, but I used a bench grinder with a rag wheel and a bar or 'red rouge compound' You mentioned I believe 'blue' and 'green' compound. Where does the red fall in the pecking order for final high luster?
Thanks for posting!
The red rouge compound is commonly referred to as jeweler's rouge because it is used extensively by jewelers and because of the unsurpassed level of high quality polishing it provides to gold, silver and many other precious metals.I believe it’s the same as the green 🤔 . Hope this helps and thanks for watching
Thank You Andi for showing your Polish Methods. What are the Polishing Discs you use? I thing this is very usefully, because when you are using the wrong Polishing, it all can get very bad....
+Jürgen Kremer thanks for watching. I bought the discs online. Came as a pack, ruff medium and soft. You can't go wrong. Just keep the blocks with the right discs. All the best Andy
Hi Andi, thank you for your answer. I will proove it! But it looks very good what what you are doing, the results are fantastic with this old stuff.
how much grit is that sand paper ?
Wow, looks stunning! Could you tell me how many RPM you use for buffing? Thanks in advance!
Thanks for watching, I have no idea what RPM the motor turns at. It’s more about the pressure you personally apply for the final buff. I hope this helps 👍
Fantastic work and results!Subscribed!...I have a Dura Ace 7400 from 1984 works perfectly! I would like to remove scratches and then polish but I am afraid of damaging the Lacquer that the aluminum has and then start some kind of corrosion? Do I need to fear that? Or is it just to use sandpaper and start the process you are showing here!
Grateful for answer! You are very inspiring! Regards George
Firstly thanks for subscribing, regarding the lacquer, you can buy this fairly cheap. It’s in a spray form and is even available on eBay. Just search clear protective metal lacquer 👍 I hope this helps
@@BikeItUK THANK YOU VERY MUCH!!!
RJ the Bike guy sent me.
Fantastic I send many of my viewers to him also. I hope the video was helpful 👍
Hi Andy. Thanks for this video. I went out and bought a bench grinder, polishing wheels and paste and I'm ready to go. I started on a 3ttt stem that had a couple scratches. I sanded those out and then started polishing. It's not looking very good! I think there is a clear coat over the aluminum as some areas are polishing fine and others look dull. Do all the aluminum parts have this clearcoat? Do you have to sand the entire clearcoat off the stem, cranks, etc., before you can polish? Is there an easier way to remove this clearcoat?
Hi, you are better giving the whole thing a quick sand down to remove the clear coat first as this can be extremely stubborn and prevents the high polished look.
Andy, every thought of using an ultasonic cleaning bath? Bob your parts in 30 mins later they will come out spotless! little investment long time saver :)
Thanks for the heads up, I’ll definitely look into it 👍
Sir what grit was that paper??
Can you make more lessons for learnt how revolve a bike oneself?
Yes I have a few planned watch this space, all the best and thanks for watching Andy
Bling the bike, nice.
+BoogieKnight1976 thanks for watching and the comment all the best Andy
I need some parts polishing for my MK2 golf GTI is this something you can do?
As long as its metal I don't see any reason why not. Hope this helps
Would this work on the bike frame itself? As in if I polished the chainstay and then used a clear varnish.
no reason why not, thanks for watching
Where could I pick up those rubbing compounds you mentioned? And how much are they going to cost me?
+Evan Johnson hi thanks for watching just search metal polishing and google should bring up a few suppliers thank Andy
Beautiful ... you can now sell these parts as new 🙂
Thanks for watching I hope it helps you I. Your own project all the best Andy
Step 4 is there any hand held tools that can be used instead of a bench buffer?
Hi, thanks for the question regarding polishing metal. Yes you can buy simple drill attachments. It just takes a little longer 👍 Good luck 😉 hope all goes well with the project
As most Cranks are an aluminum alloy, presumably they have a anodised coating, would sanding and polishing not remove this protective coating, and mean your mirror finish would turn dull very quickly?
The polished items I have done over a year ago remain shiny. When you polish It puts a waxed coating on. This is not as hard wearing as the sprayed coating. However when removed makes polishing a lot easier if needed again. Hope this helps Andy
Yes, that is certainly an issue for aluminum parts. The procedure in this video is great to get a mirror finish, but if you use your bike in all weather or don't wash it at every opportunity, then polishing and buffing will be necessary again soon. Bare aluminum is poorly protected from mechanical wear & corrosion: only a very thin oxide layer forms naturally (2-3 nm), while anodizing can enhance this layer up to micrometers. Most aluminum Campagnolo cranksets, derailleurs, seat posts... are anodized, as well as many T3 components.
It is a question of visual vs. durability: you can improve greatly on the bare metal by adding a wax, varnish, or clear coat, especially on parts subject to mechanical wear (e.g. cranks) or dirt (e.g. derailleurs). However, anodized surfaces are still far more robust. Furthermore, if you want to truly "restore" the original look of these components to as-bought, you must either keep the anodized surface (which limits you to cleaning and very mild polishing) or have the cleaned/polished/buffed bare metal anodized again by a professional. Given the many variables involved in the anodizing process (i.e. temperature, acid solution, voltage, current, pore sealing method), you're unlikely to reproduce exactly the same look as the manufacturer, but you will get closer than this. It will also last forever again, with just regular care (e.g. a few months of caking on mud will have limited effect if you store the bike indoors).
the compounds you use are a mix of abrasives and wax, which melts due to the friction heat and leaves a thin coating. But you might be removing again or thinning it further with the chalk powder. Even purpose made car wax coatings need to be re-applied after a few months, although those do experience more weather & sunlight (on cars).
This is just a bunch of additional detail, and everyone's mileage will vary (pun intended). Great video!
How many watts is your Bench Grinder? Planning on doing the same over the Bank Holidays. Thanks
Thanks for watching I’m unsure of the watts of the bench grinder. I do know it’s not that powerful because you can grab and stop the wheels from turning under power.
What type of grain do I need? to remove the scratches? Metal Grade? But what number?
+15thsquadron01 Hi thanks for tuning in, in away at the moment so I couldn't give you exact numbers, start of fairly ruff and work to as fine as you can before buffing and polishing up. It all depends on the depth of the scratches also. Hope this helps Andy
I have a steel bike frame... I was wodering if i can mirror polish my bike frame.
No reason why 🤔 good luck 👍
STEP 0.5 : Strip the anodizing with Lye (oven cleaner - EZ-OFF or equivalent, look for a spray-on oven cleaner that has warnings for lye). Spray the part, scrub gently with a plastic (worn-out vegetable) brush, then lay it in a pan for 5-10 minutes. This will evenly strip all the anodizing which is 3x harder than the soft aluminum and will produce a much more uniformly smooth result. Do not leave the part in lye for too long or you could get pitting or uneven stripping.
+Donald Gillies firstly thanks for watching, secondly thanks for the advice. I will be trying that out. All the best and thanks again Andy
Where do i buy the polishing wheels and compound from please?
I have had them a while now, I’d just search on google for bench grinder polishing wheels. That should bring up the correct items, hope this helps
Would you spray a clear coat on it or just keep it waxed? Always enjoy your videos.
Firstly thanks for watching and happy you enjoy the videos. Ref your question when buffing it does put a coat on to the surface which protects the metal anyway. Also if left it is a lot easier to buff up again with a cloth. Hope that this helps Andy
after a few years and repolishing parts, i prayed a thin layer of clear coat on it, doesnt seem to hurt the looks but its STILL FINE AFTER YEARS
wax/oil/polish wears off so fast
Great job! But do you clear coat it when you are finished?
+Ben Voiles no due to the clear coat fading and can cause more of a problem later on. Hope this helps Andy
BikeIt UK Without clear coat, how long does it keep the mirror finish?
please make one on how to restore a wheel
Noted and added to the list..thanks for watching Andy
Three words : Rock Solid Execution!
Thanks for watching and your support all the best Andy
Great video as usual!! It is necessary any kind of varnish or something in order to protect the metal after de polishing?
+Ximo Ehrmantraut hello thanks for watching and the comment. You can use a clear coat if you wish. I'd say it depends on how much use and where the bike is going to be used. Thanks again Andy
yes
Are these cranks made of steel or aluminum?
Thanks for watching the older Cranks are steel
do you take the anodization off the parts first?
+151octane thanks for watching! The components, such as wheels, derailleurs, brakes, and chains, are usually made of stainless steel and not aluminium. If you have anodization aluminium parts it will fade over time because the anodization is actually a thin layer of color that can wear and chip over time. The buffing wheels or sanding would remove any layers in that case. I hope this answers your question. All the best Andy
youll have to "strip" it to bare metal, aka just replace it if anodized