I’ll take a wild guess at beech. Looking forward to seeing the paint come off. +3 for Osmo. I finished a box project recently and used 2 coats of Polyx over four applications of quick drying tung oil.
What are you planning to do to strip the paint?
I've had good succes with a brown/crystal soap - not sure about the english name for it, but is a thick gel-like substances with a high pH. Smear it on thick and wrap it in cling film. Works just like chemical paint stripper.
Here they are atm.