Rust-Oleum Automotive Universal Bonding Primer Spray is a fast dry formula that bonds to difficult surfaces including two part epoxies, creating a sound base for the topcoat. Firmly bonds to difficult-to-paint surfaces including galvanized steel, furniture, wrought iron railings, bumpers, trim, aluminum flashings, metal, wood and more. For indoor and outdoor use on a variety of surfaces. Stops Rust primer provides long-lasting protection from corrosion.