Coin Mokume

[MarvinB]

Coin Mokume to use as a bolster I would think it would need to be hardened can someone tell me how this works 

[Michael Cochran]

How what works?

Making mokume gane discussions and tutorials are easily found all over the web with a little search. Learning how to harden nonferrous alloys can also be found with a quick search. 

[MarvinB]

Sorry guys should of Googled it first man did I ever over think this process it work hardens 

[Chinobi]

I wouldn't expect hardening it would be necessary for a bolster, but you are correct that it can be work hardened. Hammer it down to a bit over your finished dimensions without annealing and then just sand/file/whatever to finished size.