[Rich]

Are you going to repaint or are you trying to restore the original gelcoat?

If you want to take all the paint off you might be in for a lot of sanding. Removing bottom paint with a soda blaster usually is very sccessful, I'm not sure it would work to well for topside paint. Someone else might be able to chime in here..

If you are just going to repaint, you might be able to get away with using a high quality primer and and skip the process of removal.