This. For literally everything. Steel? Check. Nickle? Check. Wood? Check. Leather? Yep. Brass, Stainless, bluing? Check,check,check...they'll use this stuff for everything even preserving paper documents believe it or not.
Apparently finding some may be an issue. Lee Valley is where I got mine from and a little dab will do. A little goes a long way.
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I agree this stuff is good, I use it all the time to.




















































