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If you can work some slurry on an area with no stamps, honing over the stamps will not erase them for a while, unfortunately the label is in the way..

yep that's true, too bad though I'd be interested to see how it compared to your Nakayama (IIRC you have one?)

I wish this one guy had done a test to tell us where this stone lie in a progression.
Hope it sells well Jim.