Phenomenon
Film loses its gloss and clarity during drying.
Cause
A. Polish with compound before the thinner evaporated
B. Improper preparation of substrate.
C. Using improper thinner.
Repair
A. Dry the film completely and polish with compound.
B. For severe case, refinish on it.
Prevention
A. Clean the substrate thoroughly before application.
B. Take enough drying time for the best result.
C. Select the product carefully.