Gunsmithing - How to Finish a Rifle Barrel Using Cold Blue

Published on August 17, 2011
Duration: 1:29

This guide details a practical cold bluing process for rifle barrels, as demonstrated by Larry Potterfield of MidwayUSA. It emphasizes thorough preparation, including degreasing and heating, followed by repeated application of a cold bluing solution and subsequent scrubbing with steel wool. The method, when patiently executed, yields a beautiful, durable blued finish suitable for firearm restoration or customization.

Quick Summary

To cold blue a rifle barrel, start by thoroughly degreasing the metal. Then, heat the barrel in hot water, dry it, apply a cold bluing solution like Arch's Belgian Blue with a cotton swab, reheat, dry, and scrub with 4-ought steel wool. Repeat this cycle 3-4 times for a durable, uniform finish.

Chapters

  1. 00:06Introduction to Cold Blue
  2. 00:18Barrel Preparation Steps
  3. 00:31Initial Heating and Drying
  4. 00:40Applying Cold Blue Solution
  5. 00:53Second Heating and Drying
  6. 00:58Scrubbing and Repeating the Process
  7. 01:08Achieving the Final Blued Finish
  8. 01:12Conclusion and Summary

Frequently Asked Questions

What is the first step in cold bluing a rifle barrel?

The first crucial step is to thoroughly degrease the entire barrel surface. This ensures the bluing solution adheres evenly and prevents any oil or contaminants from creating an imperfect finish.

How many times should the cold bluing process be repeated?

The process of applying the cold blue solution, heating, drying, and scrubbing with steel wool should be repeated three to four times. This repetition is key to building up a deep, uniform, and desired dark color on the barrel.

What tools are essential for cold bluing a rifle barrel?

Essential tools include wooden handles for safe gripping, cotton swabs for precise application of the bluing solution, clean cotton towels for drying, and 4-ought steel wool for scrubbing between applications.

Can I achieve a good blued finish with just one application of cold blue?

No, a single application is generally insufficient for a quality finish. The cold bluing process relies on repeated applications, heating, drying, and scrubbing to gradually build up the desired dark color and uniform appearance.

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