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IME I drew a pencil grid on my Naniwa stones and lapped that grid off. No more no less. Once flat the stones performed just fine. I don't see the need to lap them beyond that. I would perhaps look to...

I'm not sure if we're talking about the same thing but mine have speckles so I guess it must be the same ? Seems to me that is a normal state of affairs. When I lap any stone I draw a pencil grid and...