SAFE FOR VARIOUS SURFACES: Our Teak Cleaner and Brightener will not harm painted surfaces or fiberglass, ensuring worry-free application and restoration. SIMPLE & EASY CLEANING PROCESS: Apply directly to dry wood, spread evenly using a bristle brush or scrub pad, and let it sit for 2-3 minutes before lightly scrubbing along the wood grain -Then just rinse thoroughly with fresh water and let air dry.