There are many mediums on the market that can be used with oil, but in basic terms, they can be used to achieve three things: to alter the drying time, to change the finish, or alter the viscosity of the paint. Our wide range of Oil Mediums will give you a great array of opportunities to experiment, including mediums from Winsor & Newton, Daler-Rowney, Schmincke and Cobra watermixable oils.