PPG Training

Custom Restoration Guide 2017

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51 Caution: Wear the proper safety protection when sanding, cleaning, mixing and spraying all materials included within this process. PLASTIC PRIMED PARTS PD-1220 51 Depending on the supplier of the part, it may be beneficial to check the integrity of the primer coating. The test in Step 2 below will help you determine whether your part can be sanded then topcoated, or if it will require paint removal prior to continuing the restoration process. 1 Wash part with hot water and soap. Rinse and dry completely. Clean entire part with the appropriate PPG cleaner using clean towels to remove contaminants. Dry thoroughly. 2 Test existing finish by rubbing it with a strong thinner or urethane-grade solvent on a clean towel. If coating wipes off or softens significantly, remove it by sanding and skip to Step 4. If coating integrity is maintained, it is an acceptable foundation for the restoration process. 3 When the existing finish is known to be acceptable, follow these steps: a. To remove minor defects – Block sand with P220-P320 grit. The goal is NOT to strip the surface to bare plastic. The goal is to level the surface and remove the defect. b. On edges, body lines and hard to sand, recessed areas, use a gray scuff pad or a pad coarse enough to remove all gloss. 4 Re-clean entire part thoroughly with the appropriate PPG cleaner, using clean towels. Dry completely. Tack off the dry part. 5 Apply plastic adhesion promoter to bare plastic and cut-through areas. 6 Apply one coat of flexible sealer to the entire primed plastic part. 7 Proceed to Paint Application.

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