I do the same thing actually.
DMT stone (holes, but you deal with them), then a surgical black arkansas stone. It's supposed to be about the same grit as the green DMT, but it's not as aggressive so it will actually even out the striations left (you can still see them) by the DMT, and smooth it all up a bit.
I don't find the need for much more than that, it'll shave for a couple weeks with that treatment, and anything more than that just isn't worth my time on an EDC.
_z