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Dcaddo I use sic but keep in mind it is loose and not fixed in place like a diamond plate.
I also have a machinests straight edge to keep an eye on what is going on.
If the stone is saddled I use...

I completely wore out a dia-flat with only a few hundred Arkansas stones,even lapping in a trough of water with light pressure the diamonds wore out.cheers.

202617 I use a nice cold rolled piece of steel I had flat ground . It works a treat with sic.