Well I don't know that I'm qualified to be called out with those other guys, but since you went and put my name in there I better step up to the plate.
I hand sand Ironwood with a hard backed surface (usually a steel sanding stick) up to 1000 grit. Then I move onto 1200 and 2000 grit with a hard rubber block. I actually have several different blocks for getting into whatever area I'm trying to reach.
After 2,000X, I've tried several different methods.... the 3M micropolishing paper is something I've been messing with lately.
But my old standby is to take it to 2000X and it has to be CLEAN. Meaning I sand one direction and then switch directions with the next grit. I don't want a 2000x finish with some 320 scratches hiding somewhere.
Anyway, once it's at 2000X, I do a REALLY REALLY light and quick buff with a semi-hard sewn wheel and white rouge. I'm talking a matter of seconds for the entire knife handle... just skimming over it lightly. If you buff it very hard, you'll either smear the grain, or get an orange peel type of finish.
Finally I like to hand rub a couple coats of wax into the wood with my bare fingers....let it dry to a haze and then buff it with a flannel cloth.
Some blocks of Ironwood only seem to smear with buffing, and then you have to buff them by hand.