I want to run some .999 silver bars through a slip roller to reduce their thickness. My intent is to try to do some coining in the style of medieval moneyers, using homemade dies. I assume that the rolling will harden the silver, but how much? What would be a good technique to anneal them so they will be dead soft? I don't have any ovens that can go over 550 F, so the operation would have to be done with a torch, I suppose.
Also, where can I get a punch that would allow me to make 1-2" diameter blanks? Would a standard arch punch work (on the annealed metal), or would it wear too rapidly?