CLR PRO® Exterior Rust Remover effectively removes unsightly rust stains and surface corrosion from vehicle exteriors. For paint prepping and improving appearance of any vehicle. Readily biodegradable and contains no phosphates, ammonia or bleach. Safe to use on clear coat paint. Great for: Antique Cars, Patina Restoration, Paint Prep, Cars, Trucks, Vans, Heavy Equipment. Effective on Paint, Rubber, Glass, Vinyl, Aluminum, Chrome, Stainless Steel, PVC/Plastic.