I'm finally going to try some of that zinc filler rod for the first time to repair a cast aluminum barbecue top that cracked. The ones I bought don't have any instructions and I don't know if I should use propane, MAPP, or OA. I definitely want to avoid melting/wrecking the barbecue and, of course, have no idea what alloy the top is.
Can you folks give me some advice please?
Thank you as always,