Alkyd medium can be used as a painting medium and as a glazing medium. Used as a painting medium, the "fat over lean" rule should be followed. The medium is quite fat and can be made leaner with a quantity of white spirit or turpentine. In the final coat and for glazing techniques, Alkyd medium can be used pure. It is slightly yellowing, shortens the drying time and increases the durability of the paint film. The gloss of the paint becomes slightly higher, the brush stroke fades.