I would use this material but sand the inside surface with coarse grit paper and get most of the finish off. The bees will cover anything they find offensive.
I wouldn't varnish the inside if I had a choice, but since it's already varnished, I wouldn't worry about it. The bees will put their varnish over it anyway.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
Beesource Beekeeping Forums
A forum community dedicated to beekeeping, bee owners and enthusiasts. Come join the discussion about breeding, honey production, health, behavior, hives, housing, adopting, care, classifieds, and more!