I have a 19 ft. boat with a soft top that seems to rot out every few years. I have gotten to thinking that I could probably build a hard top from plywood/glass that would probably stand up fairly well (good excuse to use the skills I have learned making a kayak). Is there anywhere that I can get more information on how to do this? How well will the epoxy hold up over time (the boat is in the water all year long). Any other considerations I should be thinking of?

Thanks,
JJ