So I primed the plaster casting white. Using acrylic dark/light brown stone colors, I sprayed the dark color first. I use a hair dryer to speed the drying time. I donโt like waiting ๐. Then I use the other colors like a wash. I usually use three different like colors. It leaves a marble like finish. Put a little paint on a flat brush and dip it in water. Then let the watery paint mixture flow over the object. Once it dries add more if needed and then move on to the next color. I will be adding some Woodland Scenics water to the fountain once it arrives.