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The slurry issue is always subject to debate. Some school swear by it other say no way. I know that in Japanese tradion this is a major part of using the stones, creating a slurry with other stones...

Norton makes Nagura for use with the 4K/8K stone. It is 3/4" x 3/4" x 3" and retaisl for around $17.

It is useful to lap the Norton with as well to even out the wear.

Tony

You would be amazed at what one can do to ruin a stone <g>.

I took a vintage, well worn Coticule I had and tried cleaning the surface with a pumice stone. Well, as soft and crumbly as a pumice is...