We used the stripper a couple of years ago when we were faced with removing 20+ years of bottom paint
from our 34' boat. It worked fairly well, but in the end we found that a scraper and then light sanding
was easier and less gruesome. The stripper certainly did soften the paint, making it easy to remove, but it was messy, and kinda finicky in that you have to keep the stuff moist while it does it's job. This meant covering it all with plastic wrap. We still found it necessary to do a light sanding
to get to clean gel coat.