How To Paint A Rusty Metal Roof [4 Steps To Follow]

How To Paint A Rusty Metal Roof [4 Steps To Follow] To paint a rusty metal roof first you have to get rid of the rust. Use TSP to get the rust and staining off the metal. Then use a vinegar coating on the metal surface. After that, apply primer to make the metal rust-proof. Finally, apply paint to your metal roof.