I'm planning to use lining paper to cover unsightly plater walls in a small cupboard, 1.3 metre square, which I use for storage but which also houses a tumble drier with integral condenser. I don't want to risk the possibility of the humidity of this small area causing the wallpaper to loosen; is there a particular type of paint or pehaps a prior treatment to the lining paper before painting which would lessen the risk. In a similar vein, is there a varnish or a finish that decorators use to cover a painted paper in bathrooms to avoid the humidity/steam loosening the paper from the walls?