My boat is an '87 Starcraft, 19 ft. The hull has been turning chalky to the point I figured I would have to either buff it out or wet sand it. Well, I've been using Zymol on my truck & figured I would give it shot on my boat hull. I am amazed at the results. The Zymol has completely removed the chalkiness & the deep red color has returned. I have only done the transom, which was the worst looking, but I am going to do the entire hull. I have previously used 3m products, various polishes, & rubbing compound, with little or no effect. I did no prep work other than a good washing. Give it shot, it may work for you. I wish I could post pics, but my digital camera has bit the dust.