Question: is linseed oil a paint thinner?
Answer: Linseed oil is not a paint thinner nor a medium. ... I make my own 1/3rd turpentine, 1/3rd linseed oil, and 1/3rd Damar varnish medium. If you use straight linseed oil with your oil paints, your painting will take a long time to dry and will probably yellow over time.