Guys:
I too had the same problems using Brownells rust blue. The color was inconsistant. Finally, after messing around for quite some time, I converted over to higher temperature Nitre bluing. The results are spectacular as I have been running some test barrels through the process. Once I get a few more under my belt, I may hang out a shingle to do C96, Lugers and P-38's.
Mark
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