Apply the Watercolor Ground straight from the container using a foam brush or a synthetic brush for a more textured finish. For the smoothest surface, apply very thin coats with foam brush, allow to dry thoroughly between coats. Curing: to allow the watercolor ground to attain the correct degree of absorption, let the watercolor ground dry and cure for at least 24 hours (depending on humidity) after the last coat. As with all the DANIEL SMITH Watercolor Grounds, our Pearlescent White Ground provides a surface to paint with your watercolors on most any substrate, and it is mixed media friendly. The DANIEL SMITH Pearlescent White Ground has an excellent lightfastness, is archival and gives you more creative ways and surfaces to paint with watercolors!