Yes, I agree that the Mesohippus cleaned up beautifully. This horse was pivotal in the evolution of the family and you can see it because all of the “cheek” teeth–premolars and molars are molarized (squared off), which makes them a better chewing battery for plant foods. Mesohippus is the first genus of fossil horse in which this occurs.
It will be nice to see what Rachel comes up with when the limbs are cleaned up.
The color of the badlands Mesohippus teeth (and other fossils too) contrasted with the creamy background of the bone makes them beautiful specimens, as you note Lee!