I used House of Hepworth's trick to protect the toilet tank. It worked like a charm. I was able to paint all the way behind the tank. Whew!
Here is a shot of the painted wall over the doorway. This bathroom is tiny so its hard to take pictures.
For other parts of this project, go here: Removing wallpaper
Up next is showing you the finished project with new paint! Primer makes a world of difference!