Designed for use on clean bare metal, previously coated or lightly rusted metal. This primer is compatible with Rust-Oleum Stops Rust brand finishes. This primer is not compatible with top coats that contain strong solvents such as automotive finishes. White clean metal primer covers approximately 550 sq. ft. per gallon at 1 mil. dry or 275 sq. ft. per gallon at 2 mils. dry. Dries to touch in 2 to 4 hours, to handle in 5 to 9 hours, and to recoat in 24 hours. Thin with no more than half pint paint thinner per gallon. Clean tools and equipment with paint thinner or mineral spirits.