Gentlemen- The rust bluing process went exceptionally well through the first 5 cycles (rust/boil/card).
Cycles 6 and now 7 are not turning from rust red to black.
Suggestions on causes for this?
I am using Brownell's Classic Rust Blue solution, a stainless steel tank and house water (RI water is pretty neutral). I have no problem maintaining a rigorous boil.
Thanks!
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