Learn the easiest and best ways to remove wallpaper in common situations, including If the old wallpaper is not vinyl, the glue under it may get wet and start to mildew. If the paper is stubborn, you can help it along by using a razor knife. Washable vinyl wallpaper is a durable and easy-to-clean wall covering found in many homes. Removing it to paint or repaper, however, is not so easy. The vinyl outer layer protects the paper and adhesive below it from moisture.