Since the major use of graphite is as a dry lubricant for metal parts, I would strongly suspect that it will not have any cutting action. Especially as I have a couple of machines lubed with graphite that have hours and hours at thousands of rpms, or in shaving terms millions of laps, without showing wear except of course when there isn't enough graphite for proper lubrication.

If you are dead set on trying it though, you can buy bottles of graphite powder at the hardware store.

I can't find the quote right now but I thought the Black paste was Boric oxide, not sure though