Quote Originally Posted by mjsorkin View Post
Can't naniwas be lapped with some sandpaper? Norton stones also feel a little rough after the lapping plate because it's 220 grit. I finish the stones on wet dry paper. The lapping plate is durable but will sometimes deposit a little blue slurry, maybe this caused the discoloration?
You can use sandpaper, but in the long run, you'll spend more money on it than if you had gotten the DMT. Should work fine for a short term solution, but cheap brands can sometimes leave grit embedded. Stick w/ Norton or 3M brands to avoid this.