Pulled my boat out of Big Bear Lake last August - though forewarned, I was truly impressed with the new two tone hull the lake gave me - crystal white, and furry green slime - my Cat 22 look like a pubescent, male 16 year-old in search of a razor. Gave the boat a good shave before taking it home for the winter, but of course still needed to deal with the green stain. Have since ended up deployed overseas with a return date TBD. So after sitting all winter, it may also sit out part of this year's sailing season. The marina I put the boat in offers an "acid treatment" in the fall and spring which everyone swears is the only thing that really works. Having missed my fall chance, likely to miss my spring chance, and having an interest to see "if I can do it myself" (yes, despite all of the sound advice which I have ignored - probably to my undoing) - anyone have any ideas? The Boat US and West Marine catalogs are full of products which state they take off green slime, barnacles, rust, layers of skin, years off one's life, etc. Any of it work? Or should I just fork over another couple of hundred dollars and let someone else worry about it? Scott