Rust-Oleum 8 Oz. Rust Reformer chemically converts rust to a protective coating, eliminating the need to sand rust down to bare metal. Once applied, it s rust into a black, rust-inhibitive, and paintable coating, providing an effective solution for rust treatment and prevention. This 8-ounce formula is designed to protect and extend the life of metal surfaces by stopping rust in its tracks. Model Number: 7830730