blue wonder gun blue - 2 oz kit blue wonder blue wonder gun blue gives you everything you need to provide the best care for the valuable investment you have in your guns! this will serve you for dozens of bluing touch-up jobs and up to six complete re-bluing projects. no need to put up with that holster wear anymore! looks and wears like factory blue. easy to apply. this kit contains the following: blue wonder gun blue – 2 oz. blue wonder developer - 0.5 oz. blue wonder gun cleaner - 1 oz. blue wonder xfr lubricant - 0.5 oz. blue wonder is veteran owned and operated.