Chalk in My Pocket: Batik on Paper + Salt Watercolor Experimentation - Use glue, salt, and watercolor. The glue makes the colors rise from the paper and the salt creates a 'starburst' look.
Line paint tray with heavy duty aluminum foil. When done painting, pour excess paint back into can and throw foil away. Why didn't I think of this? Cleaning the paint tray is the worst!