I have a project, but not quite a kayak project.
My dad picked up an old canoe for $15 at a yard sale. (One of the ones that looks like it is made out of shredded plastic.) It looks like it may have fallen off a car during transport. There is a huge crease/hole in the center. Being the cheapest guy on the planet I'm going to try an patch it with some marine varnish and fiberglass this spring and see if I can get it to float again.