The skin-on-frame adirondack guide boat originally designed to access the interior of the adirondack wilderness, the guide boat is a miracle of ultralight engineering.. Learn how to build a plywood boat. you can make a great boat out of one sheet of plywood. watch our video here and see how we build a boat. there are links at the end. Links to profiles of kit manufacturers: rettey build a pontoon boat and save hundreds of dollars. you have to see this great system!.