Winsor & Newton - Artists Picture Cleaner - 75 ml - Not strictly a solvent, Artists' Picture Cleaner is a liquid which dissolves linseed oil oxidation by products and cleans soiled oil paintings. Artists Picture Cleaner is an emulsified mixture of Copaiba balsam, dipentene and pine oil with ammonia. The liquid settles out in two layers. Shake well before use. Thinning is not recommended.