Edgecomb Steel in Cornwells Heights PA use to have a Stainless Steel Autocar Truck that sat out in front of their plant for years. It was very cool. I can only imagine most of the steel plants that stamped the panels for cars and trucks did this. Personally I can't see where the stainless would ruin the dies. They would have to use a lesser grade stainless to be mallable and it shouldn't be much different from stamping hundreds of pieces of steel. Should it? Zilla!