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You pour a small amount of grit on a plate, add enough water to act as a lubricant anf then hone until its time to go onto the next grit or the grit has become degraded and doesn't remove much...

I do use it, or rather I used to. Far (and I mean far!) Too much money for what it is.

I use lapidary grit and Atoma diamond plates now.

Regards,
Neil