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I would imagine that most novaculite-type natural hones like translucent arkansas have just that effect - and have been used for many, many years too. Many of us have - or have used - one, in one or...

It has been done before, quite a number of years ago, by guys on this forum. Don't ask me for links - haven't the time to look for them, but it was well documented at the time. One guy used the...