According to extensive independent scientific testing, Rust Bullet is the most effective, longest lasting, easiest to use rust/corrosion-control product on the market. Rust Bullet Automotive Formula has been awarded Two United States Patents for its advanced technologies, providing phenomenal adhesion and superior protection. Use for all your Automotive Applications including undercarriages, frames, floor pans, rocker panels, suspension and much more.Our Automotive Formula contains more metal and is a bit thinner than our Industrial 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 Color Shells or Rust Bullet Clear Shot for unbeatable rust protection. Rust Bullet Automotive is metallic gray in color. Rust Bullet Automotive can be brushed, rolled or sprayed.