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Yes , Al Ox is a slower cutter but some stones also contain Si C which puts them not too far behind diamonds in speed but without the depth of scratches. It's interesting that even some Jnats can...

You find a 6 micron plate cuts faster than a 14 micron stone ? Seems a redundant step to me. :shrug:

Yeah that's my experience. The 1200 is a bit gentler but I don't even use DMT's on razors any more.

It is impossible a 1200 is coarser than a 325 but because of the pimpled surface of the Atoma you can gouge a stone with too much pressure.

I think when I first met So Yamashita who suggested these plates he had his for about 7-8 years. I'm sure he still has it as he uses it to create slurry & the more wear the better in that case but...