I had a beautiful floor-to-ceiling bookcase built of old oak that had been stored in a barn. The wood was planed, sanded, cut and stained before being fumigated. It has now been polyurethaned and installed, and I still have worms. My termite guy has sprayed it with chemical. I've sprayed and painted it with several different chemicals. I'd love to keep this bookcase off the burn pile. Does anyone know of anything else I can try?