How to Remove Rust Stains From Exterior Paint

Wipe the rusted area on the paint with a clean rag to remove any loose rust particles.

Apply a rag soaked in rust remover to the rust stain. For a light rust stain let the rag remain on the stain for 30 minutes. For a heavier stain the rust remover can stay on the paint overnight.

Remove the rag and wipe the rust stain away with a damp rag. The rust stain should be loosened enough to remove the stain completely. You do not have to rinse the rust remover from the paint. Dry the area completely with a clean rag.