Our Automotive Formula contains more metal and is a bit thinner than our Standard Formula allowing for an easy application with HVLP automotive finishing guns, as well as brush or roller, and provides a smoother finish usually desired for automotive projects. Use Rust Bullet Automotive Formula as a stand-alone coating, or in combination with Rust Bullet BlackShell, Rust Bullet WhiteShell, Rust Bullet ColorShells or Rust Bullet Clear Shot for unbeatable rust protection. Metallic gray in color. Covers approx. 100 sq. ft. per coat – minimum 2 coat application required.