Just a quick simple question for the experts. I bought myself a 12" aluminum Jon boat for a really cheap price. The only problem is that is has a few leaks. On the underside of the boat the ribs are pretty worn out and thin. And a couple of the rivets are leaking. I already beat the rivets back together, but I am curious as what the best way would be to patch the bottom side of the boat. I was wonder about some bondo or fiberglass but I really dont know. Any info would be greatly appreciated and thanks for looking.