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Take it for a test drive.

Hone a razor or kitchen knife with a hone you know
and then apply the unknown hone and see if it improves
the edge.

It is also possible to hone a small block of...

How do you describe the shiny flakes?
None of my Arkies have 'flakes' in them....

In general you can coax a good edge out of an Arkie with
a light touch and in some cases by using thicker or ...