Rust-Oleum Stops Rust Automobile Primer provides a smooth, rust-preventative base coat for most types of automotive enamels and lacquers. Usable on vehicles to ensure maximum paint adhesion, formula is fast drying and wet sandable for exceptional results. Includes Stops Rust formulation to provide unparalleled corrosion- and rust-resistant protection. Primer features a wider spray tip for comfort during extended spraying and can be used at any angle, including upside down. Not for use on galvanized steel.