PlastiKote Rust Converter organically converts rust to an iron-hard, paintable surface. Non-toxic and environmentally safe, the Rust Converter formula is non-flammable and contains no hazardous chemicals. Once painted, there is no bleed-through staining of subsequent top coat paints and no bubbling or foaming, according the company. PlastiKote recommends sanding surfaces before applying Rust Converter. The product is available in 8 oz and 16 oz bottles.