A mate of mine saw this done on beer cans at a field day and I've found some internet sites that offer this sort of product, but I have trouble believing that I can weld (?solder?) anything much thicker than beer cans with propane heat and a welding/brazing/soldering rod while the heat on the weld site is rushing away though the alloy at the great speed which makes it a difficult metal to weld. <br /><br />Anybody know anything about these materials?