OK here's my first effort. I made a Williams 20c coin window. First I drew the artwork using Paint.net (free software similar to Photoshop). Then I printed the design onto clear waterslide decal paper in reverse. I also printed an outline of the design onto white waterslide paper. Cut them both out and applied them to a blank window (available from Marco Specialties). Lastly, I sprayed a coat of acrylic clear on the back to seal. As you can see it came out pretty well. It could perhaps be a little darker, not sure if I will get around to doing it again. I also have the artwork for the Bally windows. I have found a source for the blank Bally windows in the US (Tyler-Olson@live.com) and am waiting for them to arrive.