Thread: Does a Naniwa 12K Super stone need lapping

To keep the metal filings from building up you should be sure to use water on the hone while honing. Not a lot, just a spritz and whenever you see that metal residue, called "swarf", starting to appear while honing just rinse it with water and your fingers. Do not allow it to build up on the hone. The general procedure is to lightly refresh ( clean, lap) the surface of the hone just before a honing session. I use a scrub brush/nylon dish pad under running water when possible or a light lapping on 1000 grit wet/dry sandpaper (use it wet).
This gives you the best honing surface.

Hope this helps,