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Watch out when using any colored polish like rouge and such, the horn/bone is porous and it's hard to clean it of.
I would also be careful with any petroleum based polish, get a crap piece of horn...

I've had a few people who want the old dirty bone/horn scales replaced, after 15 min of micro-mesh and oil while talking to them they want to keep them.
It's a lovely material.

Yes i might, really dry horn gets white.