What it isWinsor & Newton Artists' Acrylic - Modelling Paste — This modelling paste is light weight and flexible so it doesn't shrink or crack. Increases opacity body and structure and is ideal for carving sanding and building extreme textures. It can be used t The materialsWinsor & Newton mediums are formulated to work specifically with the corresponding paint range. The chemistry is correct: the right resin, oil, or solvent balance to modify paint handling without compromising the paint film’s integrity or archival qualities. Who it’s forPainters who want to adjust the handling properties of their paint — extending working time, increasing transparency, creating glazes, accelerating drying, or modifying surface texture. How to use itAdd in small quantities to paint on the palette or on the canvas. With oil mediums, fat-over-lean still applies in the paint film. Read the specific product guidelines — some mediums are designed for use in specific paint layers. Why we stock itWinsor & Newton mediums are the safe, trusted choice. When a painter asks what medium to use, this is what we reach for.