When I cleaned the pontoons on the used Weeres I bought a year ago, I notice quite a little pitting. The pontoons hadn't been cleaned for several years and had a lot of scale built up. I'm pretty sure the pitting was there when I started cleaning them. I used a regular pontoon cleaner so I don't think it was the problem. Is it common to have a pitting or corrosion problem in fresh water lakes if the pontoons are not cleaned? Do I need to do anything special or just don't let it get that bad again?<br /><br />Charles