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The hone is a blue thuringian. The scratches are not harmful, I normally use wet sandpaper of 300 to max. 600 to prepare thuringian hones after planing. Polishing of thuringians to get an absolut...

Raising a slurry on a thuringian is somehow subject to personal reference. Of course slurry speed up the honing process, but concerning thuringians, this speed-up process is on the light side...