Every summer around the month of July, a lot yellow dirty stains begin to show on my Capri 26 1991. These stains are at waterline level and can go as high as 7or 8 inches and are quite uneven. I sail in fresh water but I know that this boat once was in Maryland. Does that have something to do with it. I do not know . I am always able to remove them at spring with a strong stuff but it might affect the gelcoat on the long run and it's not so pretty either. Any suggestion ?
Thanks
Thanks