I have added a few images on my 2011 2275 RCW after her 2nd year in the water in Michigan's Saginaw Bay. I used the dealer recommened Zing product. Needless to say, I am very happy with the results. I'm sure that since I scrub the toons just about every trip out, that it helps, but the Zing took off ALL oxidation and cleaned them right up.
Todd
Todd