Check out the System3 website. They have a free book you can download. And free advice via e-mail. Their products are excellent. If you need strength, use fiberglass cloth. It lays out nice and takes the epoxy well. It may be a little more expensive but, you'll have no regrets.
Bateau2.com and BoatBuildersCentral.com are a couple of boat building sites that have some valuable info too.