Winsor & Newton Liquin – Fine Detail 75ml The most fluid of the Liquin family of products, this gloss medium is ideal for fine detailed work. It is also perfect for use in smoothly blended areas with no brushmarks. It is the modern alternative to the traditional copal mediums that were based on natural resins and offered fast drying properties to the artist. As with all Liquin products, it offers an increased resistance to yellowing. Liquin Fine Detail produces a smooth surface picture, absent of brushmarks, as with a Van Eyck or Durer.