I had the same problem with my jon boat. What you need is to get some paint stripper, fine steel wool, a drop cloth or a tarp, some chemical resistant gloves, and a paint scraper. Paint remover is so nasty stuff so you'll want to work outside. Also, use the tarp to keep the paint remover off of your porch or wherever you're working. You want to apply thick coats of it on the paint using an old paintbrush. Wait about half an hour until you can see the paint loosening and scrape it off with the paint scraper. After that you need to rub off the thin layer of paint left with very fine steel wool. It's a long process but it gets the job done.
