I.G. Its will all stick together, you tight azz, if you don't have clay use a little santinite, anything that will keep the can from sticking.
Dan, that will work, but its a lot easier for me just to use box tubing , then to try and make a high carbon box from flat stock. I don't know where I could buy high carbon box tubing. A lot of guys do just grind clean and restack the can, its usually so thin it doesn't affect anything anyway. Also when I do a can, I don't fold the contents. Usually its a pattern like a star or something and by folding it would distort what I'm trying to make, I usually weld, stretch, cube, cut and reweld. Always keeping the next billet equal size on all sides. I illinimate the can, I just coat with clay slurry and it comes off pretty easy.
Bill