Product Description Birchwood Casey Super Blue Liquid Gun Blue Product Details A double strength blueing solution designed for blueing highly polished steel parts and hardened steels containing nickel and chrome alloys (except stainless). SUPER BLUE Extra Strength Gun Blue is the blackest blue. Use caution to confine the solution to the area to be re blued, as it will have an effect on the existing blue. • 3 fl oz * Cleaning products in liquid or aerosol form cannot be returned for exchange or refund, unless faulty or delivered incorrectly*
