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I am not the most experienced guy at this sort of thing but I hate to see someone not get a reply to a straight foreward question. The options for repairing tin or body metal are TIG welding, MIG welding or as you mentioned brazing. TIG (Tungsten with Inert Gas) is similar in theory to welding with a torch except you are using an arc. What you have is a Tungsten electrod and filler rod. You strike an arc and use it and the filler rod to fill the crack. This is and excellent way to fix body metal, it is low temperature and uses less filler therefor less surface repair. It is tricky however and requires special eguipment. MIG (can't remember what it stands for other than Inert Gas) is more similar to arc welding. It uses an arc and filler rod however it feeds the filler rod to the arc. It is kind of the "Hot Glue Gun" of welding, you simply squeeze a trigger and the arc starts the rod feeds and all you have to do is direct it. It does create more heat in the metal than TIG so you can only do short 1/2" to 1" beads at a time and work around and around the piece so that it doesn't get to hot and warp. Lots of people have MIG welders and most hardware stores (Home Depot) sell them. And finaly is Brasing, it uses the old torches and a brazing rod. The key here is to not get the metal to hot and cause warping. so once again you can only do small sections at a time and work around the piece so that it doesn't warp. If you aren't sure take the piece to a local welding shop and have them do it. It would be a short job for them and if you are in a small town maybe a case of beer would cover the charge. Hope I helped and didn't confuse you. If someone is reading this and finds a mistake then please correct me.
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