Rust repair

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budmancan

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Im getting this new to me gun soon. It has the following rust spot to it. How would I go about fixing it? Can I complete myself or have to take it somewhere.
Its not on the barrel by the looks just on the tube.

Thank you

https://drive.google.com/file/d/1G4ntTcx5z3DOu8q7y9MaRLpJ-DmmjhHl/view?usp=drivesdk
 
My bad lets try it this way.
https://imgur.com/SRaoDeZ

SRaoDeZ
 
Mag tube?
Might be cheaper to find a new/used tube and install it.

I'd try spraying it with Fluid Film and leave it over night.
Then 0000 steel wool and lightly rub it.
Worth a try.
 
It is no problem to fix it yourself, if you have a very fine wire wheel. The bristles on your "average" wire wheel are .012" thick - on a fine wire wheel they are .004" thick and are not as agressive, but will clean up that rust easily. You would first, have to remove the tube from the barrel. Once you have it down to clean steel, you can get a micro torch - the one that gives you a pencil flame and carefully heat the bare metal, until it darkens to the same colour as the rest of the tube - and while it is still hot, douse it in oil. If you are anywhere near me, I would be happy to do it for you. It would take 5-10 minutes.
 
I would use a rust remover like "Flyte" from busy B applying several applications since there is major rust. Careful with rust remover since it can dis-colour surrounding areas. Then like Kamlooky said use 0000 steel wool with oil to remove any rust left over. Otherwise the bluing looks pretty good on the tube.
 
It's bizarre how quickly something so ugly can be pretty... all those brides that get pimples the morning of the big day...
The original blue is mostly gone there, but some time with 0000 steel wool, and wiping with oil between sessions will make it less horrific looking, and maybe stop it from spreading.
 
As mentioned 0000 steel wool and oil will get it off but there will probably be some pitting. You can cold blue the affected area when done to make it more presentable.
 
Steel wool will probably remove some of the bluing if done too much and usually does. If you use a stainless steel pot scrub balls (not copper)(look like shaved string sort of) withG 96 or another oil it should remove it without damaging anything else. I usually get them at the dollar store.
 
When oxygen combines with iron to create red rust - FeO2, the product has more volume than the parent material, so red rust "erupts" and causes pits in the parent material. There are electrolysis techniques to change the FeO2 to magnetite - "black rust" - Fe3O4 or similar, which take up less volume than the red rust. When you scrape or abrade away the red rust, you are removing Fe atoms that used to be in parent material and are now gone. So you are left to deal with pits. And the rust is down inside the pits, so probably need or want to get down into them to clean out. The coating with oil will separate the iron from the air, stopping the formation of more red rust. So will turning it into magnetite, which, I understand is actually very close to what "rust bluing" is doing.
 
Fine steel wool and oil to start.
Then see how bad the pits actually are.

If you can live with the worn blue and other scuffs, you can likely live with the pits too.

Otherwise experiment with strips of sandpaper (wet or dry) and match as close as you can the 'grit' of the existing marks under the blue that is not damaged. Remove as little material as you must, re-blue using touch up blue, oil as needed.
 
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