Stream with Rapids, Autumn (2002) is an example of painting oil over acrylics. I don't do this often because, if you paint oil over too thick a layer of acrylic, I am told, you risk the paint peeling off later. In this case, I "stippled" (with a sponge) many thin layers of acrylic paint of many autumn colors, then defined the drawing and direction of the creek with charcoal, then refined areas with oil. Voila. I think this painting has a delicacy because of the interaction of multiple media.