Apply the paint in thin layers using light, crisscrossing brushstrokes. Start at the ceiling line and work from top to bottom, one small area at a time. The wet surface may look uneven, but brush marks and color variations will level out as it dries.
Finish one wall completely before taking a break. If you must stop, a corner is a natural stopping point. A seam left in the middle of a wall may remain visible on the finished surface.
Stir the paint regularly during use, as the clay settles easily to the bottom of the container.