Rust-Oleum 215215 Stops Rust Rust Reformer Rust Reformer 10.25-Ounce Spray-Color Black For use on exterior or interior rusted metal surfaces only Water-based film forming product converts rust into a paintable surface, there's no need to sand to bare metal Dries to touch in 20-40 minutes and covers up to 12 sq ft Protects surface from future rust Creates a flat black finish that can be painted 24 hours following application with any oil-based top coat