BoatBanter.com - View Single Post - Bottom Paint ,,, 20 layers of Bottom Paint ,,, how to remove it.

In article ,
says...

You may think I was trying to be a smart ass instead of helpful but,
trust me, whatever other method you used doing it yourself, you would
quickly conclude that I was being immensely helpful.

This might be more helpful. It the stuff isn't flaking off, just slap
another coat on and figure it out next year. Think of it as ballast.
Smaller boats have gone around the world with sheets of copper tacked
over the bottom with felt underneath. I little extra hull thickness
isn't going to hurt anything for cruising and nobody's going to see
it.

If it is flaking off, just knock of the loose stuff with a scraper and
have at it with the paint rollers.

Super excellent advice. I took a 26 footer down to the gelcoat once and
followed up with a barrier coat and abalative bottom paint. Never, ever
again. I was contemplating doing the same to our 37-footer, but, upon
examining the bottom on haulout, decided as you have suggested. Knock
off what's about to fall off and roll on a new coat. I am so pleased to
have my decision validated by so many knowledgable people.