There was one painting at the ICA in Boston that really caught my eye by Kia Althoff. Part of it was very flat and done right on the backside of the plexi, the rest of it was in watercolor. In looking on the net for this artist, I found that his choice of materials was nothing less than wild. There is much to learn from looking at what he makes his art out of. Anything can make art. Goggle him and take a look. I couldn't find any shots of the type of painting that caught my eye, though.
I am the author of Master Disaster, 5 Ways to Rescue Desperate Watercolors. Based on a course that I have developed over many years, the bones of this book give you a plan to finish your paintings--and even your bombs. The meat of my book and course, though, is to help you structure your life to encourage and accommodate painting. Painters have to paint. This is how to do it.