Aqua Blue is designed for use on copper, brass, bronze, and our metallic coatings. Aqua Blue reactions produce various shades of milky blues that are so familiar with slightly aged copper, brass,and bronze. This solution can be applied directly onto metal alloys, or onto the final, tacky coat of one of our metallic coatings. On metal alloys, Aqua Blue will react to form shades of milky blue and light blue. When applied to one of our Metallic Coatings, the colors are determined by the coating being used, though they tend toward a variety of light blues. Regardless of the medium being used, colors may be altered with water mists or by subjecting the parts to high humidity for various periods of time.