At least one of the cold bluing solutions contains selenium dioxide, to accomplish the bluing. There are also methods of cold bluing, which do not require heat. Cold bluing solutions are technically made for touching up scratches on already blued steel surfaces, this bluing can also work well to finish larger areas. This explains why blued firearms must also be oiled, and why surface rust appears on …

Apply blue solution: Now, it is high time to apply the cold bluing solution over the metal. Cold Bluing. With Oxpho-Blue, all you need do in most cases, is dampen a piece of cotton flannel and give the area a …

Cold bluing is a method which doesn’t require heat. Cold bluing isn’t especially resistant to holster wear, neither it provides a high degree of rust resistance.


2. Originally developed for the occasional bluer who is not equipped to completely polish a gun prior to bluing, Oxpho Blue - because of its ease of application and remarkably superior results - has become a favorite of the professional gunsmith as well.

Selenium-containing cold bluing solutions work by depositing a coating of coppe…
Generally, it gives an adequate cosmetic retouch of a gun’s finish when applied and additionally oiled on a regular basis. The cold bluing solutions usually are sold in little bottles and are applied with a brush-type applicator. Both "cold" and "hot" oxidizing processes are called bluing, but only the "hot" process provides any significant rust and corrosion resistance, and then only when also treated with an oiled coating.

Commercial products are widely sold in small bottles for cold bluing firearms, and these products are primarily used by individual gun owners for implementing small touch-ups to a gun's finish, to prevent a small scratch from becoming a major source of rust on a gun over time.

Take a cotton ball and drench it into the solution. Finest Professional Cold Blue On The Market-Period! Now drag over that ball over the skin of the metal.