Galeria Acrylic Paint 500ml Permanent Green MediumGaleria Flow Formula Acrylic Colour is a range ideal for artists who require large quantities of good quality colour at an economic price. Vibrant colours with a smooth, free flowing consistency, extremely versatile, easily diluted with water and suitable for a variety of techniques. They can be used on numerous surfaces but are not recommended for use on shiny, greasy surfaces such as glass, unprimed metal or surfaces with painted colours.