ARMOR PROTECTIVE PACKAGING'S MetalRescue can safely and effectively remove iron oxide from metal in as little as 20 minutes, leaving the base part and other materials unaffected. It is water-based, safe for aluminum, brass, copper, chrome, gold, lead, nickel, silver, titanium, tungsten, solder, or solder points. The non-toxic liquid solution does not include harmful hazardous acids found in alternative rust removal systems.