These alcohol-based liquids are the same shades that are in all of the Skin Illustrator palettes and can be used alone or to refill the palettes. To refill the palettes, first shake the bottle thoroughly until you can hear the mixing balls moving freely inside. Pour a small amount into the cell, gently stir while using the low setting of a blowdryer. When the color is almost dry, shake the bottle again (it can settle quickly) and repeat the process until the cell is filled. This long-wearing makeup can be removed with alcohol or an oil-based cleanser. Grey Matter can be found in the Skin Illustrator Necromania Palette.