The top stem and case are African Blackwood, the lower are Bog Oak.
I put them both thru the same sand, Iso wipe and wax process I always do.
The BO looked fine but had what felt like little raised edges all over both pieces and I wasn't happy with it.
An hour or so later and a bench littered with what looks like the crap a mechanic would clean out from under their fingernails.
I took a toothpick to both pieces and cleaned out every crevice of what must have been dust the Iso wipe missed and I'd then sealed in with the wax.