i would asssume that his procedure would work good with thin sheet metal or aliminum also. i am building the back box panels of my t bucket out of unpressed roofing metal. i got a 10 ft by 5 ft piece of this stuff ceramic coated both sides for 39.00 canadian. they even put in in a break and split it down the middle.
i am going to cut 4 round holes in the rear panel for tailights and will have to use some kind of hole saw to cut the stuff without distorting it.