PPG Basecoat Blending - Solvent SOP (PD-0706)

This standard operating procedure (SOP) covers the process for successfully blending a basecoat using a solvent borne finish. Before beginning any repair, it is important to always wear the recommended safety protection required for the job.
Follow along with the outlined process below to help achieve a flawless finish.
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PD-0706: BASECOAT BLENDING - SOLVENT STANDARD OPERATING PROCEDURE
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1. Identify Color Formula
Identifying the correct color formula is the essential first step in achieving a good match of the basecoat. Look up the vehicle color using a color retrieval tool and identify the location of the color variant deck in the color box.
2. Check for a Variant Chip
Check for a variant chip that provides an acceptable, blendable match.
3. Prepare a Sprayout Card
If necessary, prepare a sprayout card, using the correct G-shade card recommended by the formula. Sprayout cards, or a letdown panel, are required for tri-coat, quad coat and translucent colors.
4. Apply an Approved Sealer
After checking to determine that all panels have been prepared properly, apply an approved sealer, using the recommended G-shade for the basecoat color. Apply just enough sealer to cover the primer surfacer area.
5. Blend the Sealer Edges
To create a smoother transition, melt in the sealer edges using a blending solvent. Or, after the sealer has dried thoroughly, lightly scuff the sealer edges with P800 grit sandpaper.
6. Appy a "Wet Bed" to the Repair Area
Applying a color blender to the repair area-extending just beyond the color blend-will create a “wet bed”, which can also assist in blending, especially for metallic and pearl finishes. This process is spelled out in the product information bulletin.
7. Mix the Basecoat
Mix the basecoat, according to product instructions.
8. Prepare to Spray
After the color is mixed and with the repair area properly masked and parts de-trimmed-such as mirrors and lenses and moldings-apply the basecoat.
9. Apply the First Coat
Keeping the gun 6-8 inches away from the surface, apply medium light coats with 50 percent overlap. Keep the gun aimed straight at the repair-no wrist flicking.
10. Applying Additional Coats
Allow each coat to flash for 5-10 minutes before applying the next, and step each coat further than the previous to create an invisible blend.
11. Apply the Clearcoat
After the final coat of color has flashed for 15 minutes and all panels are tacked off, apply the clearcoat according to product instructions.
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