Building an aluminum boat. (maybe)

I have a 5X10' sheet of .040 aluminum and have been thinking about using it to build a small boat to mount on top of my tear. I have built many wooden boats but none out of aluminum. I am thinking of building a frame and skinning it with aluminum. I want something to paddle around in that will be just big enough for my wife and I.
Anyone seen anything like this around? Aaron
Anyone seen anything like this around? Aaron