Ok, what do you want to know about removing old wooden boat paint because I repair wooden boats! First thing is you want a tyvek suit and a full face respirator if this is a large bottom job. Boat paints can be very toxic, especially the older stuff. If you want more info please feel free to comment in the comment space on this question and I will answer any further questions you may have. >
To remove paint from an old wooden boat, you will need a marine paint stripper. Ready-Strip, Aqua-Strip, Ultra-Strip, Sea Hawk Marine Paint Stripper and Interlux Interstrip 299E are some of the best marine paint strippers. Whichever stripper you settle on, make sure you wear a respirator because marine paint is usually very toxic.