Liquitex Paste Mediums - Liquitex Paste Mediums are very thick, matte, opaque preparation mediums of marble dust and polymer emulsion used to build heavy textures on rigid surfaces. Liquitex Paste Medium handles like clay and dries to a very hard stone-like surface. Paste Medium can be mixed with acrylic color or over-painting when dry. Liquitex Paste Medium makes an excellent substrate for acrylic paint, oil paint, oil pastel, oil bars, watercolor, graphite, or dry pastel. Great for sculpter applicateds and may be sanded, carved, or drilled when dry. For use on rigid supports.