Rust-Oleum Stops Rust 12 oz. Protective Enamel Spray Paint provides the ultimate rust protection, superior coverage and durability. Suitable for use on a variety of materials, including metal, this spray paint can be used on both indoor and outdoor surfaces. Featuring a variety of colors, the spray paint dries in approximately 120 minutes and provides coverage for up to 12 sq. ft. Color: Khaki.