hi . I'm currently in the process of damp proofing my bedroom before decorating. Was thinking of using foil damp paper then papering over. But am unsure what type of wallpaper I can then use? The other walls are decorated using enamel wallpaper then painted. It is my understanding that this type of wallpaper can not be used on foil paper? Want to try and avoid having to redecorate the whole room. Any suggestions??