For solid color, 3-coat coverage on greenware. If you love layers, coat your pieces with Opaque Underglazes! Applied directly to greenware, soft-fired bisque or bisque, these underglazes provide solid coverage over even the darkest colors, and are perfect for airbrushing and brushwork. Mayco Fundamentals fire to an opaque, porous matte finish and are safe for food when a 06 food-safe clear glaze is applied over them.