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I'm confused. So do you recommend choosing any ONE between 320 and 1000 and that one grit will work for lapping, or do work your way up the grits starting at 320, and ending up at 1000?

What do...

I need to lap my Norton 4k/8k stone and I am wondering what kind of sandpaper, and what grit size to use when lapping it.

Also, Do i need to lap the 8000 side? If so, do I need to use a different...