Dissolve rust stains. Star Brite Rust Stain Remover is a great way to lift rust stains from fiberglass, metal and painted surfaces. Formulated to begin working on contact, this easy to use rust remover penetrates rust on smooth surfaces as well as welds and other hard to reach areas to dissolve corrosion without heavy scrubbing. A rinse of the area neutralizes the rust stain remover and reveals clean metal. Heavier stains and rust may require a second application and some light scrubbing. For rust stain removal without heavy scrubbing use Star Brite Rust Stain Remover. Key Features Ideal for removing rust stains from fiberglass, metal and painted surfaces Gallon size for easy refill of 22 fl. oz. spray container Easy to use spray on formula. Often does not require scrubbing. Does not contain harsh acids