Cold Bluing Revisited: Brownell's Oxpho Blue Part 2

Published on May 15, 2010
Duration: 9:47

This guide details the process of cold bluing a Finn M91 rifle using Brownell's Oxpho-Blue, emphasizing meticulous metal preparation. The speaker, demonstrating high-level gunsmithing skills, walks through sanding, polishing, degreasing, and applying the bluing solution. Proper surface preparation and the use of heat are highlighted as crucial for achieving a professional, durable finish that mimics the original military blue.

Quick Summary

Meticulous metal preparation is crucial for successful cold bluing. This involves sanding to remove rust and old finishes, polishing to achieve the desired luster, and thorough degreasing with isopropyl alcohol. Heating the metal before applying Brownell's Oxpho-Blue solution helps the bluing penetrate and bond effectively for a durable finish.

Chapters

  1. 00:00Introduction to Cold Bluing Part 2
  2. 00:33Metal Preparation Setup
  3. 01:13Sanding and Polishing the Barrel
  4. 03:12Visual Comparison of Metal Prep
  5. 05:33Receiver and Sight Preparation
  6. 07:46Degreasing the Metal
  7. 09:06Heating and Applying Oxpho-Blue

Frequently Asked Questions

What is the best way to prepare a rifle barrel for cold bluing?

Thorough metal preparation is key. This involves sanding the barrel to remove rust and old finish, polishing it to the desired luster, and then degreasing it with isopropyl alcohol or a similar solvent to ensure the bluing solution adheres properly.

How does heat affect the cold bluing process?

Applying heat to the metal surface before applying cold bluing solution, such as with a hairdryer, helps to open the metal's pores. This allows the bluing chemicals to penetrate and bond more effectively, leading to a more durable and even finish.

What products are needed for cold bluing a rifle?

Essential products include a cold bluing solution like Brownell's Oxpho-Blue, a penetrating oil such as Kano Kroil for use with sandpaper during metal prep, and a degreaser like isopropyl alcohol. Tools like a padded vise and a hairdryer are also necessary.

Can I touch up scratches on my rifle with cold bluing?

Yes, cold bluing solutions like Brownell's Oxpho-Blue are often used for touch-up applications on scratches or worn areas of a firearm's finish. Proper metal preparation of the affected area is crucial for a seamless blend.

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