Loss of Gloss

Cause

•   Topcoat applied in heavy, wet coats.

•   Inadequate flash time between coats.

•   Insufficient film thickness of topcoat color or clearcoat.

•   Insufficient drying/curling of undercoats before applying topcoats.

•   Using a poor grade and/or too fast evaporating thinner/reducer for spray conditions.

•   Improper cleaning of the substrate.

•   Insufficient air movement during and after application.

•   Spraying over a deteriorated or solvent sensitive substrate finish without proper priming or sealing procedures.

•   Natural weathering of the finish.

Repair

• Allow finish to cure thoroughly, compound or polish to restore gloss or sand and refinish.

Prevention

•   Apply the topcoat according to product label directions using the recommended gun set-up and air pressure.

•   Allow all coatings sufficient flash between coats.

•   Apply sufficient number of coats to achieve recommended proper film thickness. Check with film thickness gauge if possible.

•   Allow undercoats to thoroughly dry/cure before topcoating.

•   Select recommended thinner/reducer based on temperature, humidity, air movement, and size of repair.

•   Clean substrate thoroughly before and after sanding.

•   For maximum holdout, use a premium two component undercoat system.

•   Properly wash and care for the finish on a regular basis.

•   Using premium topcoat color or clearcoat system will provide maximum gloss and durability.

For air dry situations:

•   allow exhaust fan to run 40 minutes or longer after spraying;

•   open booth doors after finish is dust free; and

•   maintain a shop temperature of 60 degrees fahrenheit or above, especially when drying overnight.