I just got back from so cal and saw a setup where they picked up some aluminum sheet from Home Depot and polished it. This allowed them to shape it for a specific part. After polishing it they just use a laser pointer to test where the light will hit the part. I notice that they used a couple of 1X2's to make the bends they needed, so it doesn't take any special tools or any special skills. The aluminum sheets were very thin...maybe 22ga.
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