Liquin is a good product as a medium for oil painting, helping to thin the paints and make painting smoother if that's what is required and also speeding up drying time. A 50:50 ratio of linseed oil and turpentine is the traditional medium and also very good for the same ends, and gloss is also improved as with Liquin. I like Liquin but probably would not buy it again because of cost. The traditional mixture is cheaper to make.