Quick Bluing by Ballistol
Product description
If you want to refurbish your firearm or airgun in a simple and fast way, with Ballistol Schnell Brunierung it is done in an instant.
Thoroughly degrease the surface with for example, Ballistol Kalt Entfetter and then apply the bluing liquid (wait about 3 minutes) until it turns white.
Then dry the surface with a clean cloth and apply a protective oil, for example Ballistol Gunex.