Rust-Oleum® Automotive Self-Etching PrimerABOUT SELF ETCHING PRIMER Rust Oleum Self Etching Primer prepares bare metal, aluminum and fiberglass surfaces to promote maximum adhesion and smoothness of the top coat. This product is formulated to stop rust and is an essential step to achieve a professionally finished look. Etches & primes in one easy step Stops Rust formula Any Angle Spray with Comfort Tip FOR BEST RESULTS Use outdoors or in a well ventilated area such as an open garage.