Rid O’ Rust Rust Preventer won’t remove existing rust stains. We recommend Rid O’ Rust Liquid Rust Stain Remover to remove rust without the need for abrasion. Rid O’ Rust relies on surface action for a clean, damage-free effect. There’s no scrubbing and no pressure washing. Just apply it with a pump sprayer, cloth, roller, or gentle brush, and leave it for several minutes. Afterward, rinse all surfaces thoroughly.