McKee's RV MKRV-430 Black Streak Remover 32 Fluid_Ounces Non-abrasive chemical cleaner that is formulated to quickly and effortlessly remove black streaks Works great on fiberglass, gel coat, painted and metal surfaces This powerful cleaner begins dissolving black streaks on contact, removing unsightly stains Simply spray on and rinse off its that easy Black streaks are an issue that plagues all RV owners, and they're something you cannot avoid The chemists at McKee's RV managed to formulate a powerful cleaner that requires very little, if any, rubbing Thanks to a formula that doesn't rely on harsh acids and high-octane cleaners, McKee's RV Black Streak Remover will leave your existing wax coating intact