How to Polish Metal Parts for Finishing Presented by Larry Potterfield | MidwayUSA Gunsmithing

Published on July 19, 2011
Duration: 1:34

This guide details a metal polishing technique for firearm parts presented by Larry Potterfield of MidwayUSA. It covers preparing pitted surfaces with files, using fixtures for small parts, and progressing through abrasive grits (100 to 320) for a smooth finish. The process is described as more difficult than sanding wood, emphasizing the need for careful effort.

Quick Summary

Learn essential metal polishing techniques for firearm parts from Larry Potterfield of MidwayUSA. He emphasizes preparing pitted surfaces with files, using fixtures for small parts, and progressing through abrasive grits (100 to 320) for a professional finish.

Chapters

  1. 00:00Introduction to Metal Polishing
  2. 00:22Using Fixtures for Small Parts
  3. 00:36Filing Pitted Parts
  4. 00:52Abrasive Grit Progression
  5. 01:15Conclusion

Frequently Asked Questions

How do you prepare pitted firearm parts for polishing?

Heavily pitted parts should first be addressed with a file to remove the pits. This crucial step ensures that the subsequent abrasive polishing stages can effectively refine the surface without working the pits deeper into the metal.

What grit range is typically used for firearm metal polishing?

For initial pit removal and surface preparation, coarser grits like 100 are used. The process then progresses through finer grits, such as 240 and 320, to remove scratches from the previous stage and achieve a smooth, finished surface.

Why is using a fixture important for polishing small firearm parts?

Securing small or difficult-to-hold parts, like a side plate, in a fixture is essential. It helps maintain a level surface throughout the polishing process, ensuring consistent and even material removal.

What is the recommended abrasive material for firearm metal polishing?

Cloth-backed abrasive sheets are recommended for metal polishing. This backing material provides durability and flexibility, allowing for effective use with a backer to maintain a flat surface during the polishing process.

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