Use Holbein Acrylic Modeling Pastes to build up richly textured surface forms on canvas, board, or other painting substrates. They come in a number of specialized formulas. - Holbein Acrylic Medium - Standard Modeling Paste, 300 ml pouchHolbein Acrylic Mediums, MDL PSTE 300ML - This all-purpose paste can be mixed with acrylic colors or overpainted. Once dry, it can be carved.