For finishing, an old japanese barber hone that hasn't been lapped in a long time. 5 sets of circles with some pressure, then circles with no pressure, and then maybe 10Xs followed by bare leather. No slurry ever, just plain water.

It makes no difference how I get to the point of using that barber hone, every razor has come off of it with a nice smooth shave.

I do the same thing above about once a week to the razor (daily shaver, same razor all week - yeah, I know, boring). The stone is so fine I suspect it's removing less material than any strop/balsa with 0.5 micron compound, and it does nothing to alter the geometry of the razor so it's very easy to keep everything in good shaving shape.