LMichaels
TVWBB 2-Star Olympian
Just an FYI FWIW, but while doing some research/reading on bending cast aluminum, quite a few folks who seemed knowledgeable said to refrain from using any heat. That heating could actually make it more brittle. Again, FWIW as I have no idea.
If you think about everything we collectively know about working with metal you'll see how ridiculous that is. If it were true the fire box would not "warp" from excess heat it would "shatter"