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Shotgun refinisher needs to get rust off hard-to-reach spots


What would be the best way to get rid of rust from the inner portions of shotgun receiver? I've just begun a refinishing job with a friend's single barrel 12 ga and I'm relatively new to this. I plan to use the Swiss Arsenal W+F 1877 Bern, rust- blue solution/process which appeared in this forum some time ago.The solution works beautifully on test pieces. Getting the rust off from the exterior is no problem with #120 Silicon-carbide paper, gradually moving down to #400. My only problem is with getting the rust (pretty severe) from the innards of the receiver. It's hard to stuff any abrasive into tiny slots like the trigger/hammer slots. I have a set of needle files and I'd considered using them but didn't do so for fear of filing off critical tolerances.I also read somewhere that a 1:7 solution of Nitric acid and water respectively, would be a good rust removal agent- does it work? I thought I'd ask here first.



Simple, non toxic and good rust remover:

1 lit water 50 gm citric acid add some ammonia [affil link] 25%,solution pH must be 3,5! (80 °C temp., cold solution works too, but slow).

Good luck!

Goran Budija
- Zagreb , Croatia

simultaneous 2004

Most any acid will remove rust, mild acids are better because they will attack the base metal the least. To give you an idea of just how mild: I've used store bought lemon juice to clean up a bike for my Grandmother before. Worked pretty well too...

Good luck,

Jim Gorsich
Accurate Anodizing Inc.
supporting advertiser
Compton, California, USA
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Thank you Mr.Goran Budija, I'd like Just a few clarifications - How do I work the solution on the rust? Simple application? Lots of it or do I just dampen the areas? And what would be the time period for the process? (The rust in the slots seem to be pretty severe- somewhat crusty) Or do I have to immerse the whole part into the solution? I'd appreciate the guidance.


- Shillong, Meghalaya, India


Hi all,

Thank you for all the suggestions. Jim I'll give the Lemon Juice treatment a try with the next shotgun I get. Nice idea I never thought about it! Thank you Mr.Sishani, for the kind suggestion. By artist blasting, do you mean those air-brushes used in art/painting? Thanks Mr.Budija, since I've got all the required stuff at hand, I'll give your formula a try first. I've got some ammonia [affil link] Solution -25%, Specific Gravity- 0.91 but no Ph rating printed, how do I find out that? Elsewhere in this form I had come across a Bluing(?) formula you had put up. Once the solution is ready, what is the process like? Immersion? if so how long? How many times?

- Shillong, Meghalaya, India

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