I need a slurry stone for my Nakayama Maruka. I tried using my DMT 325 to make slurry on just a small part of the J-Nat. It made a slurry, but I could feel scratches on the hone. I rinsed it off, and after it dried, I could feel and see the scratches. I know people use DMT 325 as slurry stone. Does this happen with you? Should I get a DMT extra fine instead? Will the extra fine still leave scratches?