Green Stuff World Auxiliary Master Medium Green Stuff World Auxiliary Master Medium is a versatile acrylic medium designed to modify and enhance acrylic paints without changing their colour. It improves flow, transparency, and workability, letting you push paints further instead of fighting them like they’re stubborn paste. Product InfoProduced by Green Stuff World, this water-based acrylic medium is compatible with most hobby acrylic paints. It’s formulated for use on plastic, resin, metal, and painted surfaces, making it a flexible addition to any painting setup. About the ProductMaster Medium can be mixed directly with acrylic paints to increase transparency, extend drying time slightly, and improve brush control. It’s ideal for glazing, layering, smooth blends, and subtle colour transitions where thinning with water alone would weaken pigment strength or cause tide marks. Think of it as paint optimization, not magic, but close enough. What’s IncludedOne bottle of Green Stuff World Auxiliary Master Medium. Additional DetailsWater-based acrylic formula. Mix with acrylic paints as needed to adjust consistency and transparency. Suitable for brush use and airbrush when thinned appropriately. Clean tools with water. Not a varnish, primer, or paint on its own. Ideal ForMiniature painters and scale modelers who want greater control over acrylic paint behavior for glazing, blending, and smooth layered finishes.