Most Protective Patina Formula for High Carbon Blades??

I did not check that. What is with bringing threads from the back from the dead? I kinda wish they'd lock a thread after it goes 5 years without activity.

I'm kinda glad I'm the only one here that will take the time to look stuff up. My source - Bluing(steel)-wikipedia.

To sum it up hot bluing is the standard because it's faster not because its superior protection against rust. Rust bluing, or how we would patina a knife offers equal protection to hot bluing but takes longer. Fume bluing offers the best protection in the bluing category. So hot bluing isn't superior to anything. In order to see any benefit from any of them oil is still required.

My coworker would disagree with oil alone. He oiled his m4 blade. One day in rain gear n she was completely red.

Finish is important. If I don't plan on using a knife I mirror polish the edge and oil it. If I pull one of these out it might have a little patina on the edge but never any rust. If I just oil a coarser factory edge it has a tendency to turn red over time.

I'm thinking composition of the steel matters a lot too. Maxamet seems to patina really fast naturally compared to other steels.
 
You are correct- hot bluing is faster, and rust bluing is better. Both suck at rust protection. Both are better than a mustard patina, but they still suck.
Rust bluing is more complicated than the way people patina knives. It involves rusting, boiling, carding-repetitiously.
 
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