Ammonia has been mentioned a few times.
I just wanted to post the CAUTION from my M&P Shield owner's manual [PDF]:
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Ammoniated solvents or other strong alkaline solvents, should not be used on any Smith & Wesson firearm.
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It also says:
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Some cleaners can cause damage to your firearms.
You should avoid prolonged solvent immersion and avoid any ultrasonic cleaning of your firearm. Choice of solvent should be restricted to those products specifically developed for firearms maintenance.
Damage to a firearm’s finish may occur if these cautions are ignored.
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Be safe. Live long & prosper.
Last edited by JMichaelTX; 09-05-2015 at 10:42 PM.
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