Super-Sini 50 ml Bluing agent

Super-Sini has been developed for spot bluing, cold bluing, quick bluing, and rust bluing of firearms and unpainted steel surfaces (e.g., trigger guards, etc.). Also suitable for copper and other metals. Also for industrial use. This is a corrosive chemical, so read the instructions carefully before use. Blueing agent package size 50 ml. Includes instructions in Finnish.