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Randy,

There used to be a Norton guide comparing the US grit to the micron scale and to the UK grit systems as well as giving the mesh sizes and the comparative Norton oil or water stone in the...

I've used the 5 and 1 micron psa sheets from Tools for Working wood with some success. I treat the 5 as roughly 4000 grit and the 1 as roughly 8000 grit for the purposes of doing a pyramid and come...