PlastiKote Rust Converter treats rust spots on vehicles so they are in perfect condition for painting. The product stops rust from spreading or bleeding through the top coat. Users should sand the surface they want to paint before applying the product. Once applied, PlastiKote Rust Converter organically converts rust to an iron-hard paintable surface. The non-flammable and non-hazardous chemical is available in both 8- and 16-ounce bottles.