Deb, thank you VERY much for sharing what you have learned, as discouraging as it is, and I admire your persistence with it. This information is something people in many artistic fields will appreciate...I found your blog as I began my own frustrating research into how to teach a 3-day painting workshop in England this October. I will be very interested to know if you discover a way-- I will subscribe to your blog so that I can follow the story, and wish you all the best in finding answers.