Most Original Equipment Manufacturer (OEM) parts come from the factory with a primer called e-coat. E-coat stands for Electro-deposition Coating. The part is dipped into a primer bath and the e-coat adheres to the part with the help of an electrical process. E-coat is a very durable and corrosion resistant coating so it should not be removed from the part. Most e-coat appears to be a glossy black coating.
Step-by-Step Instructions
- Review work order to ensure that all parts to be painted are present and repairs are understood.
- Inspect part for imperfections and damage. Determine what repairs should be made if any (follow all process documents for repairs made to the part)
- Clean entire part thoroughly with Wax & Grease Remover and/or SWX350 waterborne cleaner and a clean towel. Dry thoroughly to ensure there is no leftover residue.
- To determine if E-coat is stable:
Test by rubbing e-coat with thinner or urethane grade solvent on a clean towel. If coating wipes off or softens significantly, it must be removed by sanding. Apply approved bare metal primer to ALL exposed bare metal areas.
If e-coat is stable, proceed to next step. - Electrodeposition Primer must be thoroughly cleaned and may then be directly overcoated with Sealer in a wet-on-wet application without abrading.
- To remove minor defects – Lightly sand primer with a DA sander with 400 grit and an interface pad. Remove as little e-coat as possible.
- If preferred, on edges, body lines and recessed areas, use a hand scuff pad.
- Re-clean entire part thoroughly with Wax & Grease Remover and/or SWX350 waterborne cleaner and a clean towel. Dry thoroughly. Tack off the dry part before Primer Sealer application.
- Primer Sealer must be applied to e-coat. Obtain primer sealer gray shade number (G1-G7) from color formula retrieval screen. Apply medium wet coat of primer sealer to entire part.