Stain remover works with no rubbing required.Unique gel formula chemically removes stains with no rubbing required. Just brush on to the affected area, wait a few minutes, and viola—the stain is gone! Ideal for removing oil, rust, exhaust, waterline and transom stains. It's non-abrasive and is safe to use on white painted surfaces as well as on gel-coat. Key featuresUse where fiberglass stains crop upRemoves road soil from trailered boatsRequires no sanding or compoundingUnique stain absorbing gel that removes oil, rust, exhaust, waterline and transom stainsNon-abrasive quality that is safe to use on white painted surfaces as well as on gel-coat