Can you paint over rusted metal with Rustoleum?

Yes, you can paint over rusted metal with Rust-Oleum, and Rust-Oleum is specifically designed for that purpose, but proper preparation improves results and longevity. Rust-Oleum offers several products formulated to go directly over rusted metal, including Rust-Oleum Rust Reformer, which chemically converts iron oxide rust into black inert surface that can be painted, Rust-Oleum Rusty Metal Primer, which penetrates rust and stops further corrosion, and Rust-Oleum Protective Enamel and Hammered Finish that can be applied over lightly rusted surfaces. To paint over rusted metal, first remove loose rust flakes, scale, dirt, and oil using wire brush, sandpaper, or wire wheel on drill until only tightly adhered rust remains. Then clean surface with degreaser or mineral spirits and let dry completely. Then apply Rust Reformer or Rusty Metal Primer as base coat, allowing recommended dry time. Then apply two coats of Rust-Oleum Protective Enamel topcoat for barrier protection. If you skip removing loose rust and paint directly over thick flaking rust, paint will peel within months because trapped moisture causes continued corrosion. Light surface rust can be painted over after light prep. Also fix source of moisture such as leaking gutters that cause rust. When done correctly, Rust-Oleum can protect rusted metal for 5 to 10 years outdoors. So yes, you can paint over rusted metal with Rust-Oleum if you prep minimally and use correct products.