Chalking is a chalky white appearance on the surface of the paint film.
Common Cause
Pigment is no longer held & protected by resin, resulting in a powder like surface & lack of gloss due to: (1) Nature weathering of the paint film, (2) Use of improper thinner & or hardener, (3) Inadequate paint film thickness, (4) Repeat exposure to harsh environment or strong sunlight.
Prevention
Use recommended thinner and hardener
Avoid exposure to strong sunlight and harsh environments
Repair
Compound and polish to restore gloss. In severe cases sand and repaint topcoat.
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