When considering whether or not to put glow-in-the-dark stamps of crowns on your wall, just say 'no'. When we moved into our house the previous owners had made a "princess" room for their daughter. It was cute, but a major undertaking to change. Covering every wall were invisible glow-in-the-dark stamps of crowns, which were raised. I should have taken out stock in sandpaper before redesigning the room. Here's the before picture.
After much sanding, lots of primer, base paint, Advil, and many decorative and faux painting tools this is the finished product.
I can't believe it's the same room. Ah, nothing like a good challenge. :)