I've got crappy sandpaper! I do have some black ice in 320 grit, some good Norton 400 grit it's got a light blue color . The black ice isn't what it's cracked up to be for knife making! But I knew I wasn't going to go for a real shiny finish on this s90v anyway I usually reserve doing that for carbon steel! I usually go over my finish several times meaning that I sand and etch and sandblast and etch some more and blue it and . play with it a bunch of times till it looks right till it sort of looks intentional. Sometimes I'll get it pretty near shiny and decide to go back to some particular grit, like 320 or even 220. I just stop when I can't take it anymore and it starts to look sort of intentional! With this particular knife the steel was flat ground and I intend on leaving that finish on the flats, I'm sort of letting it look like a cross between a fine old Japanese samurai sword and some kind of military looking utilitarian looking tool!