ADVANCED FORMULA: Specially designed to dissolve corrosion stains caused by sprinklers, metal hardware, nuts, bolts, and other marine fittings, providing superior, easy cleaning EASY APPLICATION: The formula starts working on contact, simply spray on, wipe off, and rinse clean - no rubbing or scrubbing required VERSATILE USE: Whether you're on a boat, RV, or at home, Rust Stain Remover is perfect for marine and camper use as well as removing sprinkler rust stains, making it ideal for a variety of applications POWERFUL YET USER-FRIENDLY: Packs a powerful punch against stains, while still being gentle and safe on fiberglass, vinyl, metal, fabric, and painted surfaces NEXT STEPS: For lasting shine & protection, follow up with Premium Marine Polish MADE IN THE USA: Star brite has been a leading manufacturer of high-quality products in the United States since 1973