Grindstones should be able to deoxidize/unwax copper blocks.

I mean, pretty self explanatory.

Grindstones in the real world remove rust and oxidation so doing this to copper blocks, it just makes sense, and unwaxing also fits this scenario so why not, maybe last second you accidentally waxed it and want it removed.

Anyways, that's my idea, nothing extraordinary i know but it's the little things that go a long way.