CLEAN Wood Composite CleanerWood restoration made easy! This product is similar to "MAINTAIN" but adds a mild caustic agent to aid in your everyday cleaning of mold, mildew, dirt or light stripping of oil based products. A gentle cleaner that is able to power through your everyday cleaning needs. When Do I Use CLEAN? Use this product on composites, wood with algae, mold and mildew or previously stained wood that you want to "pull out" some of the stain.