Chalking
Cause
Pigment is no longer held and protected by resin, resulting in a powder-like surface and lack of gloss due to:
- Natural weathering of the paint film;
- Improper application of paint material;
- Using generic thinner/reducer and/or hardener in the paint material;
- Excessive use of mist/fog coats when applying single stage metallic finishes.
Repair
- Compound to remove oxidation and polish to restore gloss or sand to remove "weathered" paint film and refinish.
Prevention
- Weekly washing and occasional polishing or waxing will remove oxidation from the finish.
- Thoroughly stir, shake or agitate all paint materials.
- Use the recommended thinner/reducer,hardener, and measure accurately.
- When spraying single stage metallic finishes, apply mist/fog coats panel by panel while finish is still wet.