I've got a cute little all aluminum tea kettle that has one corrosion pinhole in the bottom. It was resting on something that reacted with the aluminum and made the hole so the rest of the bottom is sound. Soft solder won't work for a number of reasons. I'd like to put the kettle back in service but can't think of anything that will take the heat of a burner and won't melt the aluminum during repair. The bottom where the leak is is thin aluminum.