Rust-Oleum® Stops Rust® Rusty Metal Primer stops rust and prevents corrosion. Apply to heavily rusted metal (use Rust-Oleum® Stops Rust® Clean Metal Primer on clean or lightly rusted metal). Bonds tightly to rust to form a surface top coats can adhere to. Transform heavily-rusted metal into a paintable surface with Rust-Oleum® Stops Rust Rusty Metal Primer. This primer bonds tightly to rust and forms a surface top coats can adhere to—with no need for additional top coats or touch-ups.