Soaked 18 hours, just metal, including bolt, and slide, recoil plate, plus barreled receiver, used nylon brush, oil, still has shadows of cosmolineicon, but thicker gunk came off.
Pics below, some were taken before I used towel to get more gunk off, still nice green phosphate is stained. I think its new, but what else will remove the stains?
My sons pic, [home from USMC] got in there too...
Andy
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