Degreasing before Rust Bluing

[J. A. EARLY]

It will be fine in my opinion. I would not worry at all.

[Brian Arthur]

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!