Possible?  I read somewhere on the internet about a compition between US universities building kayaks out of paper based products, but could I build one out of paper?  I once build a couple of bowls made from newspaper strips soaked in water then squeezed dry and formed over a bowl using PVA glue.  I was very impressed how light and strong they were.  I see no reason it couldn't be done structurally, but my main problem seems to be waterproofing it.  Maybe using some kind of polyester resin in place of PVA glue?  I also wondered about using paraffin wax to waterproof it, but I don't think that's the best idea.  I also heard about specialist yacht varnishes that can waterproof paper mache, but I'd anticipate getting a few bumps and scratches to the kayak and so it could soak up water through the holes.  That's why I thought using something waterproof in place of PVA glue would be better, or possibly a waterproof paper mache with a coat or six of varnish on top for extra secrurity?  Many thanks

EDIT: searched for kayaks before making this post, didn't think to search for canoes, found a helpful thread.  Toying with the idea now of making a simple wooden frame (very simple) and overlaying it with paper mache.