Check the listing for details. Brownells Formula 44/40 Instant Gun Blue Creme for Steel, Cold Bluing 4oz. Color: Blue, Condition: New. Listed at 19.37 USD. Discover Brownells 44/40 Instant Gun Blue Creme, a leading cold blue for guns. Proudly made in the USA, 44/40 delivers instant and deep color for a long-lasting, professional finish. The non-drip creme formula provides enhanced control for precise touch-up applications. Designed to work beautifully on both external and internal gun parts, 44/40 cold blue for metal simplifies surface preparation. Apply the cold bluing creme with the simple wipe-on/wipe-off method. No need for prolonged soaking or rubbing. Additionally, this versatile gun and rifle bluing product isn't limited to firearms. Perfect for other jobs around the house or garage, 44/40 works on any carbon steel you want to give a blue/black finish. Whether you're working on a restoration project or need a reliable solution for various metalworking tasks, 44/40 rises to the occasion. Listing and template services provided by inkFrog