I've also only worked in the milder steels as well, although they have to have some carbon, or I can't heat treat them. Why not research working in stainless? It's as hard as God's erection, but maybe you can anneal it or something.
Another option might be to design the collar so that the metal doesn't contact the skin.
-d
Another option might be to design the collar so that the metal doesn't contact the skin.
-d
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