Use this medium in conjunction with Jo Sonja's Artists' Colours to create bold graphic crackled effects between layers of paint. Patterns can be varied depending on the thickness and brushing direction of the top coat colour. The top colour will break apart to reveal the base colour. Metallic and Iridiscent colours shold not be used over the Decor Crackle as they will not work effectively. They may however be used as base coat colours. Jo Sonja's Decor Crackle is a transparent medium used between layer of Jo Sonja's Artists' Colours to provide a weathered paint or aged appearance.