If you want the paintings to remain in their original locations, insert a tiny nail into each hole before wallpapering to avoid having to drill new ones for shelves and paintings after applying fresh wallpaper. Finding the nails will just require you to slide a magnet in once the wallpaper has dried.
13. Revive the electrical tape.
If you place the entire roll of dried electrical tape inside a microwave oven and heat it for a few seconds, you can revive the tape.