Hello. I have a travel trailer which I’m replacing the walls in the shower area.  The existing walls which are 1/4 inch thick press board with a waterproof coating are glued to the trailer walls with liquid nails. I need to remove the existing walls because the plumbing fixtures won’t  fit if I just add the new wall covering over the existing wall. My problem is the existing wall was glued in place with liquid nails and I’m afraid that when i pull the old wall off it will wreck the trailer walls. Can anyone give me some advice on a method to soften the liquid nails enough to be able to pull the walls off with the least amount of damage to the trailer walls. Thanks!