This is a final picture varnish for use when a painting is fully dry (6-12 months for thinly painted oils). It creates a subtle gloss finish and should be used with opaque or semi-opaque colours. Michael Harding oil paint mediums have been developed to enhance and facilitate the effects of known oil paint techniques. Throughout history painters have always manipulated paint in search of the perfect paint film and finish. Michael Harding Oil Mediums are fully compatible with Michael Harding oil paints and can guarantee long-term stability.