Rusty magazine

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I’ve got a blued mag for a Ruger SR9 with a few pretty rusted areas on it I’d like to address. The areas of rust are raised above the metal. Was thinking of a vinegar bath but since bluing is a form of rust that’s probably not a plan. There is of course Evaporust but I’m sure that would cost more than a replacement mag, though I could of course reuse it on other things.

At this point I was thinking of boiling the mag body, carding off the rust and just using a little Oxpho Blue on the rusted areas. The only other repair option I see is just wire brush the areas and cold blue.

Thoughts?
 
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Depending upon how bad the rust is, red Scotchbright should take the stuff off. It's expensive, but the very best cold blue I've found is Brownells Dicropan IM. It's a commercial steel blackening chemical made for industrial use. The T4 isn't bad either and is cheaper.
 
Soak with CLP or Kroil a day or so to soften the rust.
Apply more after soaking and scrub with a brass toothbrush to remove the rust.

After removal you can can cold blue.
The best cold blue I found is Brownell's Dicropan T4.
It gives a Black color that more closely matches modern bluing, and it's a very dark and durable color.

To use T4, thoroughly clean the metal, then spray with denatured or 91% alcohol.
Warm with a hair dryer and watch the surface. Moisture will come to the surface and evaporate, then apply a coat of T4.
Do not over heat, that causes the chemical to dry too fast.

After giving it a few seconds to work thoroughly flush with hot water, spray with alcohol, heat, and repeat.
After however many treatments you want to do, flush with really hot water, dry and apply a coat of oil.

Unlike most cold blues, after a couple of treatments T4 doesn't begin to puddle, and it seems to build up a more durable finish.
Rubbing between coats with steel wool only seems to abrade off the color you just applied, so I don't do that.
 
Soak with CLP or Kroil a day or so to soften the rust.
Apply more after soaking and scrub with a brass toothbrush to remove the rust.

After removal you can can cold blue.
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That is a great solution for a rusty, blued steel magazine.
 
Kerosene ... a long soak will neutralize the rust ...
remove any / all patches of rust and let long soak ...
It will not hurt the existing blue finish and the rusty spots will take on a dark finish and no longer rust ...
Old school but safe method ... I use K-1 Kerosene from Wally Mart ... used for kerosene heaters and lamps ... very pure .
Gary
 
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