Question from "Drifter"

Randy Kilmon <drifter01us@...>

After four seasons in the Caribbean, we returned to
the Chesapeake Bay last June. While down there, the
bottom was painted each season with Island 44, which I
believe is a tin-based paint.
My question is: Can a copper-based bottom paint be
applied over the Island 44 or does the tin-based paint
first have to be completely removed? Someone told me
that the two dissimilar metals would produce an
electrolytic action, and that the tin would have to be
completely removed.
Any thoughts, greatly appreciated.
Many thanks,
Randy Kilmon
S/Y "Drifter" (SM 240)

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