Meguiar's M50 Marine/RV Liquid Cleaner Wax cleans, polishes and protects all fiberglass gel coat marine and RV surfaces in one easy step. This convenient one step removes light oxidation, haze, minor scratches and swirls, while providing long-lasting protection against salt air, corrosion and the sun's ultraviolet rays. Versatile formula is safe and effective by hand, DA Polisher, or Rotary Buffer.