I am playing with watercolor on gesso. This is sprayed with clear acrylic after I am finished. After that I can paint acrylic over it. I may play with that on one of these pieces. 
8" x 10" watercolor
This is a small study working from pics I took while plein air painting in Steelville, Missouri.
5" x 7" watercolor
The last watercolor on gesso, 
8" x 10" 
 



 
