Quote Originally Posted by Sterm View Post
Both the norton and the dmt325 are too coarse for the naniwa 12k. Lap the naniwa with them, but then give a short pass on wet sandpaper 600 .
I tend to agree. I have been using a worn smooth DMT for a very long time with great results, but not a newer one! Too rough! I sort of ruined the DMT by lapping some barber hones. Turned out pretty slick and perfect for the Nortons and Naniwas!