Seat Belt Bolts

Locate the bolts on the underside of the floorpan where they go thru, and clean all of the undercoating off the end of the threads. Then soak them down real good with WD-40 or Marvel Mystery Oil. Using a 1/2" breaker bar, try loosening them up a little bit at a time. If they won't loosen, reverse the direction and try to tighten them, you may feel the threads start to turn a little bit. Spray it down again with the WD-40 and keep working the bolt back and forth, loosening, then tightening, then spray some more until it will unscrew all the way out. When the undercoating gets in the bolt threads is when they get real hard to unscrew out.