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A separate aside, if you're looking for a barber hone, why not buy a barber hone? They were designed to do just what you want to do, anyway.

No germ issues in a non-shared hone. The hone will dry pretty quickly and you'll be good to go each time you use it.

Don't do anything to the hone to sterilize, you may damage the stone matrix. ...

I think the c12k (the one from woodcraft) would be fine. I've had less luck with another C12k that I got elsewhere - it's not as smooth, but the one that I got from woodcraft eons ago has been quite...