Bingo, I did, 2 boats. One on a 12' where unfortunately the battery tipped over and the 2 posts burned a couple 1 inch holes right through the hull. The other 14' was from the sharp edge of an anchor that was rubbing and bouncing around about a 2 inch "slot", almost 1/2 inch wide. You have to follow the directions to a "T", no using steel wool pads, sandpaper, not aluminum oxide and not iron or brass brushes. Only use the small stainless steel brushes you can get at PA. Wipe down with alcohol, no gas or paint thinner. Then heat on an angle with a propane torch, I used the MAPP gas cylinder, gets a little warmer. Don't try to melt the sticks with the torch, you have to "feed" them into the edges of the holes or cracks. The 12 foot was easy working upside down, the 14 foot I worked from the inside of the floor to build it back up. Never developed any cracks or leaks. Heck I even welded an old aluminum short 2 step ladder back together. It's amazing how strong that stuff is. If you can, practice on a couple pieces of aluminum and maybe a beer can.