Skin on frame boatbuilding method. skin on frame refers to a method of boatbuilding that has been around for a very long time. free canoe and kayak boat plans.. Yost-style skin-on-frame free kayak plans. siskiwit bay skin-on-frame sea kayak plans. for builders desiring a skin-on-frame version of the boat built in. Stimson marine offers a bow roof shed design, including skin-on-frame designs, and boat building lumber. traditional boat plans.