did you take off the gelcoat?
it might mess up the paint, or what ever you use to clean off the stain may take the paint. depends on the water where you staying also. when we stay on the atlantic side, the growth is not as bad as when we're on the gulf side. i've left mine in for as long as 2 weeks down there with no real problem. slight stain. but hull cleaner take it right off. my hull has never had bottom paint on it.
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