Yeah, I noticed as a kid that the colas etched my teeth. Even then, probably 55 years ago, I knew that wasn’t good!
Jim
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On Feb 13, 2025, at 2:25?PM, ed breya <eb@...> wrote:
?Also look into "gun bluing" for rustproofing. I have seen many equipment handle core/spring things with that characteristic deep blue color.
Ed
