Originally Posted by
timjs
I picked up some Bernzomatic AL3 sticks, I suppose I'll give that a try. Whatever the factory used, it melts near the temp of the base metal. By the time the solder melts, the aluminum parts are like play dough.
You need the correct stick like Roelof mentioned. Also need to control the heat and get on and off the part quickly. MAP gas for a DIY torch or an Oxy-Acetylene setup are best.