SHARKHIDE is an ideal long term protectant for aluminum, copper, brass, steel and fiberglass. It protects against stains, oxidation (rust), weathering, salt spray and pitting. The materials that make up SHARKHIDE Metal Protectant are a proprietary blend of many types of resins. These resins are then suspended in a blend of two different solvents. When applied to a surface, the solvents rapidly evaporate leaving the actual SHARKHIDE Metal Protectant behind. This forms an air tight film over any metal surface, and will protect against just about anything Mother Nature can throw at it.