Rust-Oleum Flat Rusty Metal Primer is a 1-gallon primer designed specifically for rusty metal surfaces. This primer provides excellent adhesion and corrosion resistance, ensuring a strong foundation for topcoats. The flat finish helps to hide imperfections and prepares surfaces for painting, enhancing the durability of the final finish. Ideal for outdoor applications, this primer is suitable for various metal surfaces and is easy to apply. It dries quickly and can be painted over with any Rust-Oleum topcoat, making it a versatile choice for metal restoration projects.