Building an aluminum boat. (maybe)

[Airspeed]

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