Sanding and polishing fossilized walrus

Probably doesn’t belong in gunsmithing, but sadly we don’t seem to have a carpentry section.

Not that ANYONE would EVER do this, but hypothetically, if someone had fosilized walrus grips that the original maker couldn’t make fit to save their lives (thankfully, not one of our forum vendors) and if I hypothetically used a diamond tile saw to cut them to fit, what would I use to sand out the few marks and ease the edges? Emery paper wet? If so, any suggestions on grit?

By the way, I’ve seen posts describe a terrible smell when cutting these. Absolutely true. Even with the water on high I’m sure the neighbors are wondering what I’ve been doing 😂