KY....Alumiweld is the stuff. I saw it a few years back at the IHRA's in Indy. the demo for this was awesome. Rodders were bringing stuff to the guys table and he would weld it, repair and so on. It was awesome stuff, easy to use and sets fast and more permanent than any metallized compound and makes JB weld seem like bubble gum.
After using it, it can be milled, drilled, tapped etc and its a perfect repair for alum parts and casings. The key part I liked was that the activator is in the metal rod...so once you heat it and it flows and then cools...you cannot remelt it again. If flows the same as a good brazing rod. Ok..I stop since its not spose to be an infomercial.
Josie, I would definately try this if the JB weld doesnt work. One or two sticks of this in the right hands has to be cheaper than a new casing.