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P220 MSE rust restoration project

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/430601935/m/6820096025

May 16, 2026, 01:43 PM
Shack
P220 MSE rust restoration project
Bought this 10mm off gb. Found a bunch of rust after I received it. Sanded it down then bead blasted it. Not perfect but much better.




May 16, 2026, 06:14 PM
12131
Good as new. Nice job.


Q






May 16, 2026, 08:13 PM
Sugarwater
That looks nice! Good job!
May 16, 2026, 09:02 PM
DaBull
Looks new. Fantastic job.


P220 (.45)
P225
P226 (9mm)
P228
P229 (.40)
P365
SP2022 (9mm & .40)

"...it's better to have a gun and not need it than to need a gun and not have it." - Clarence Worley in True Romance
May 16, 2026, 11:10 PM
92fstech
That's great work, well done!


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May 17, 2026, 06:10 AM
Shack
Appreciate it. Took a bit longer than I anticipated. Probably need to replace the springs in my elbow and shoulder now.



May 17, 2026, 11:28 AM
Com 45acp
Think I would have a nice cerakote silver finish applied to protect it from future issues. Definitely night day from when you received it.
May 17, 2026, 12:26 PM
patw
Well done. A shame it had any to begin with.
May 26, 2026, 03:22 PM
4MUL8R
Great restoration.

How did it rust? Aren’t these stainless steel?


-------
Trying to simplify my life...
May 29, 2026, 01:37 PM
Shack
quote:
Originally posted by 4MUL8R:
Great restoration.

How did it rust? Aren’t these stainless steel?


This was a gb purchase that yielded that nice surprise. I could only speculate.



May 31, 2026, 03:12 PM
cee_Kamp
Shack,
You did a fine restoration job!
Almost all the rust appeared to be under the grip panels.

I would guess that the pistol was caught in a rainstorm. The previous owner wiped down the visible surfaces and put it away.
The 400 series of stainless steel will rust.

Back decades ago I was at an outdoors action pistol shoot with a Colt stainless steel Gold Cup. We got caught in a summertime thunderstorm and got soaked.
BTW, those bowling pins FLY off the tabletop when it's wet!
I did wipe the pistol off when I got home, the external surfaces.
It sat for several days until I had time for a detail disassembly.
I was rewarded with rust and light pitting underneath the grip panels.



NRA Benefactor Life Member
NRA Instructor
USPSA Chief Range Officer
May 31, 2026, 04:47 PM
OttoSig
When I owned multiple SSE pistols, I noticed the factory rosewood grips that came in a lot of Sigs would cause rust more than other grips.

Quite possible could have been the culprit?





Nine years to retirement! Just waiting!
June 01, 2026, 12:44 PM
Shack
quote:
Originally posted by cee_Kamp:
Shack,
You did a fine restoration job!
Almost all the rust appeared to be under the grip panels.

I would guess that the pistol was caught in a rainstorm. The previous owner wiped down the visible surfaces and put it away.
The 400 series of stainless steel will rust.

Back decades ago I was at an outdoors action pistol shoot with a Colt stainless steel Gold Cup. We got caught in a summertime thunderstorm and got soaked.
BTW, those bowling pins FLY off the tabletop when it's wet!
I did wipe the pistol off when I got home, the external surfaces.
It sat for several days until I had time for a detail disassembly.
I was rewarded with rust and light pitting underneath the grip panels.


Thank you. That is what I was thinking. Or potentially a sweaty range day. It was a sickening feeling when I took the grips off. The rust hadn’t been addressed at all either, so it initially looked much worse than those pictures.



June 01, 2026, 12:53 PM
Shack
quote:
Originally posted by OttoSig:
When I owned multiple SSE pistols, I noticed the factory rosewood grips that came in a lot of Sigs would cause rust more than other grips.

Quite possible could have been the culprit?


Not on this one, but I do think that was the case with this p220 that was wearing rosewoods. But again, guessing




June 01, 2026, 06:04 PM
McGregor
Very nice work! Thanks for posting this.
This post prompted me to look under the grips on my P220 SSE. UGH corrosion started by lower grip screw holes similar to yours (but not quite as bad) on left and right side.
The inner surface of the rosewood grips looks like it has no finish on it. Going to seal them with polyurethane or Tru oil and keep a close eye on it in the future.