well i've been talking about it since i got my boat, fixing all the leaks and such. got tired of running the bilge pump every few hours to drain it. to start it's an early 1970s alumaweld. gotta love the old riveted boats... to start i had to grind the layers of glue and paste on the bottom that was already on it. i know what you're thinking GRINDER ON AN ALUMINUM BOAT?! don't worry it was a brushwheele made for aluminum. but anyways found a small crack/hole in the back of the boat so i decided i'd better try to weld it shut! not very experienced with welding aluminum but after practicing on scraps for a few hours i figured i'd give it hell and see what i can do! so after that was done, roughed it all up put marine grade primer on it thats made to go on aluminum ( stuffs expensive!) and then put up a little tarp house over it with a few space heaters inside to help it dry a bit faster!