How To Episode 10: Cold Blue

Published on August 14, 2013
Duration: 11:05

This video demonstrates the effective use of cold bluing solutions for firearm touch-ups and small part refinishing. It highlights key products like Birchwood Casey Perma Blue and Brownells Formula 44/40, emphasizing proper surface preparation, including cleaning and light heating, for optimal results. The process involves careful application, neutralization, and final oiling to protect the new finish.

Quick Summary

Cold blue is best used for touching up small scratches and blemishes on firearms. Proper preparation involves cleaning and lightly heating the metal. Apply with 0000 steel wool, neutralize with water, then dry and oil the finish for protection and blending.

Chapters

  1. 00:00Introduction to Cold Blue for Firearms
  2. 00:58Recommended Cold Blue Products
  3. 01:41Surface Prep & Demonstration
  4. 02:31Cold Bluing Application Process
  5. 05:54Refinishing Small Parts (Screw Heads)
  6. 07:10Neutralization & Final Protection

Frequently Asked Questions

What is the best use for cold blue on firearms?

Cold blue is most effective for touching up small scratches, blemishes, or worn areas on a firearm's finish. While it can be used for full refinishing, achieving professional results requires extensive metal preparation. For minor repairs, it offers a convenient and accessible solution.

Which cold blue products are recommended for gunsmithing?

Popular and effective cold blue products include Birchwood Casey Perma Blue and Brownells Formula 44/40. Formula 44/40 is often favored in professional settings for its consistent coverage and ease of use on both warm and cold metal surfaces.

How do I prepare a firearm surface for cold bluing?

Proper preparation is key. The metal surface must be thoroughly cleaned to remove all oils and contaminants. Lightly heating the metal with a small torch can help open the pores, improving the chemical's adhesion and reaction for a better finish.

What is the final step after applying cold blue?

After the cold blue has reacted, it must be neutralized with water to stop the process. The part should then be thoroughly dried and immediately coated with gun oil. This oil protects the new finish and helps it blend seamlessly with the surrounding original bluing.

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