For use over primed treated substrates such as alclad aluminum, steel, fiberglass and wood. These enamels have typical enamel characteristics such as a longer drying time between coast and masking. They dry dust free in under 1 hour but should not be masked for trim in under 48 hours. Enamels show full luster, good color retention and excellent flight proven durability. Thin with 257 enamel reducer. Quarts and gallons must be sent UPS ground only.