Auction Containers Calgary I Bought A Bar From An Auction And I Had In My Attic It Became Very Sticky.I Brought It Down To Room Temp?

I bought a bar from an auction and I had in my attic it became very sticky.I brought it down to room temp? - auction containers calgary

still sticky so I thought I could give a polyurethane top coat is still tacky after 24 hours and still seemed worse. The bar has been produced abroad, it is sure to warm up to the container. What must I do to get rid stickyness? Thanks