Applying the underglaze to greenware allows you to see the close-to-finished design, making it easy to locate areas that need more attention or additions. Also, you can apply a far wider range of underglaze colors to greenware than you can to bisque ware.  To begin your underglaze, start by grasping the bisqued piece with a clean cloth. Next, apply the color to make your design as you would on a watercolor painting. Work in layers to make sure the end product is vibrantly colored. You may need anywhere from two to six coats of glaze to yield the desired result. Once your painting is complete and the underglaze is dry, brush on a clear topcoat and fire.