A new faster formula (works in seconds), and at a more competitive price. We have extensively tested and formulated, and improved this product, here at AK-Interactive. With our Metal Burnishing fluid, you can naturally weather and rust white metal tracks, such as those made by Friulmodel or ours. Just dip the tracks 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 using different dilutions and varying lengths of soak.