Marine 31 Pontoon & Aluminum Cleaner is a solution to years of oxidation, built up grime, and calcium deposits. The thick, easy to use polish is perfect for stainless steel, uncoated aluminum and even diamond plate surfaces. Marine 31 Pontoon & Aluminum Cleaner can be used by hand or machine to bring out a brilliant shine for every metal surface on your vessel and more. The superior cleaning abilities easily cut through the scum line and other sea dwelling contamination that degrades your boats shine. For more serious damage like oxidation, Marine 31 Pontoon & Aluminum Cleaner performs best with machine polisher equipped with the proper pad.