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February 6, 2010
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Just something I noticed the other day while cutting a lemon in half with a plain metal knife. This was not a stainless or plated knife. I left it on the counter for an hour or so after cutting the lemon, and I noticed that the acid in the lemon turned the knife a really dark blue like bluing on a gun. I washed the knife and it stayed that dark color. I wonder if that would work with a Q-tip dipped in lemon juice and applied to a spot that needed touching up on a gun???
Steve
June 26, 2013
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I know lemon will remove case colors, but I really don’t know about the bluing. I’ll let someone else be the guinea pig 
.
January 24, 2013
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I am no expert, but that is not something I would try…
June 5, 2015
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It may sour the gun. ??
Vince
Southern Oregon
NRA member
Fraternal Order of Eagles
“There is but one answer to be made to the dynamite bomb and that can best be made by the Winchester rifle.”
Teddy Roosevelt
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