The Winsor & Newton Galeria iridescent acrylic medium adds a pearlescent finish to acrylic colours. Mix this medium into acrylic colours to give colours a metallic shift which remains when dry. For the best results, mix in with more translucent colours and apply over dark under layers. This medium can also be applied on its own onto already dry paint to add a pearlescent layer over colour. - Brand: Winsor & Newton - Range: Galeria - Iridescent acrylic medium -500ml