Thank you Enyaw, Jo, Lazarus and Articzar. Its been a beautiful project to develop and something different. The Painting looks much better, the yupo makes a backlight effect, and the paint is iridiscent. Can't catch any of these with a camera.
Thanks Steve ... Thanks Maureen, I remember as a child filling paper with crayons and then using Chinese ink over, and then scratching to form the colors and shapes. This was similar, I made it all colorful and then airbrushed the dark background and scratched the reflections using a parallel ruler and a needle. Yupo is really difficult to damage, yet very easy to mark.