Thread: Norton 4k/8k sandpaper lapping

For starters, you need to put it on a really flap surface.. A marble or granite tile (machine flattened). You can buy'em at HD for $5 or so. I draw a 3x5 grid on the Norton and I lap it on a 320 grit paper first. That will speed up the process and reduce the wear and tear on the 1000 grit paper.. Once you make the grid disappear on 320, twice (on each side of the Norton), you can do the same with 1000 grit with a lot less effort.