You will need a flexible jointing knife or a flexi finishing trowel. Check the edges are nit burred. If they are use wet dry sandpaper to de-burr. Keep a shallow angle between the wall and blade and use light pressure. Keep the blade or trowel clean between each pass.
I keep getting lines where the blade is overlapping, how can I reduce this?
You will need a flexible jointing knife or a flexi finishing trowel. Check the edges are nit burred. If they are use wet dry sandpaper to de-burr. Keep a shallow angle between the wall and blade and use light pressure. Keep the blade or trowel clean between each pass.
@42tops thank you!
What grade of sandpaper to use for a smooth finish?
Hi John, we'd recommend a grade of 120 or higher.