Beautiful shine of wet film but loss of gloss as the film dries or ages.
Common Cause
(1) Coarse substrate and rough sanding paper lead to higher absorption of top coats.
Excessive thickness and roughness of silver basecoat lead to absorption of clear coat.
Thick coating of putty which is not thoroughly dry.
Insufficient dry of the clear coat before polish.
Improper thinner ratio.
Thinner choice does not match spray booth condition.
Bad condition of spray booth may lead moisture trapped onto top coat: ① Insufficient air ventilation or unsuitable air circulation. ② Too hot, too cold or too humid.
Repair
Polish to improve gloss after paint film dries completely. If ineffective, sand and refinish.
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