I have actually taken the whole side of a pinball cabinet cleaned it off so it would lay flat and screwed them to the walls of my game room. I have a Star wars, Jungle lord, six million dollar man , t-2 , Captain fantastic and a couple of really colorful bingo machines.
I leave the flipper buttons in . they take up a lot of wall space witch is good if you have a big game room. Also there are 2 sides so you can share one with a buddy or sell / trade the other .
This is just one of the many things I use for wall art of coarse Back glass is always good too .