Thanks Paul and Melanie. Years ago, I tried some oil only, and as I recall I didn't get anything I really liked. I'll have to try it again and play with the ratios of water and oil. I think we have a rainy day coming, so I could use that time.
I like this one the best. If you experiment more try some vegetable oil in the water. Way back when I used to play in a band we used water and oil with water color to create lighting effects. Paul.
