Meguiar's M4416 Marine/RV Color Restorer - 16 oz. Safely removes light oxidation, stains, and blemishes from fiberglass gel coat surfaces Revives color and enhances gloss to reveal original vibrant appearance Diminishing abrasives and mild cleaning agents work gently to revive and restore gel coats and fiberglass to their original luster Formulated specifically for removing light defects from all gel coat and fiberglass surfaces Formulated to be effective by Hand or by Machine