re: Patching small holes and leaky rivets in an aluminum watercraft

I've replaced loose/leaking rivets before. If the rivet isn't deteriorated, you can easily tighten it. All you need to do is have someone hold a sledge on one side of the rivet while you peen over the other side. If needed, you can drill out the rivet to replace it. I bought replacement rivets at Grainger. Tinboats.net has a lot of info on working on aluminum boats.