I've looked for this for a while and it might be a terrible idea but... I've ordered a couple DMT plates for lapping but they aren't here yet and I looked at the granite countertops in my kitchen thinking that if I got some sandpaper, it could be smooth enough to lap a hone. Has anybody done this? Does it do a good job? It looks flat to me but I could imagine people would be against it. Any help would be appreciated.