Meguiar's 67 Marine / RV One Step Compound is specifically designed to both clean the gel coat surfaces and leave behind a high gloss finish in one step. Removes heavy oxidation, scratches, stains, and tough hard water spots on all fiberglass gel coat surfaces. Restores neglected surfaces while producing an amazing shine and luster. Restores the colour leaving behind a rich, high gloss. Formulated to be effective by hand or by machine.