I restored several pairs of old school Shimano XT M730 cranks and am very happy with the results. These cranks are easier to refinish than the M900 XTR cranks as there are fewer steps involved. Cranks are only polished and then clear anodized and do not require any other finishing steps beyond that.
At this point I have several pairs available in 170, 175 and 180mm long. Unfortunately I have very few sets of chainrings for these older cranks on hand. Feel free to contact me if you are interested in a pair.
Side by side comparison with NOS M730 cranks. The NOS cranks show a bit more grain of the metal than the refinished cranks, but otherwise it's virtually indistinguishable.