Five years ago I purchased a used Morris 32 with a copper impregnated bottom. The boat is berthed at Cape Canaveral, FL.
For a couple of years I tried the epoxy
bottom as the only means of keeping growth away. It didn''t work very well. I wanted to use it as it''s a very smooth surface, but in Florida waters the stuff just wasn''t effective. Before launching after the first trial wasn''t satisfactory, I lightly sanded the bottom to bring the finish back to life as recommended by someone; that added a little time before the growth occurred again, but eventually I gave up and had the bottom painted with Trinidad. Good paints
work better than the permanent finish for the obvious reason that the temporary finishes are continuously refreshing themselves by either sloughing off or leaching. The hard copper doesn''t do either.
The manufacturer''s website, as I recall, even concedes this stuff isn''t really effective in southern waters. It may work well in northern climates, and it certainly seems to be ideal for boats that are hauled regularly.
I can''t see any reason not to buy a boat that has this stuff on it so long as you realize it may not be 100% effective in preventing marine growths.