Have you been searching for a solution to stubborn rust stains? Rust Stain Remover is the answer to removing ugly surface rust stains. One Sprinkle rust remover: Apply rust stain remover and watch the stains vanish. Rust Stain Remover removes rust stains in and around toilets, sinks, showers and tubs. Removes driveway rust stains caused by air conditioner condensation. Removes rust stains on fiberglass boats caused by rusting hardware. Removes rust stains caused by sprinkler systems.