Metal Burnishing AK Interactive polishing liquid 100ml A new, faster formula that works in seconds. With Metal Burnishing liquid, you can naturally age and oxidize white metal chains, such as those made by Friulmodel or other brands. Simply immerse the desired object in the liquid for a few seconds and the metal will begin to appear dark and rusty very quickly, easily and effortlessly. You can vary the effect by using different dilutions and different soaking times. Contains 100 ml. Brand: AK Interactive.