We've done "brown over blue" how about "blue over brown?"

[Hessian]

I have a 36 cal Douglas bbl that is "browned." Do I need to strip it to fire blue it? (I'm thinking yes) If so what with? Would it lend itself to fire bluing? I like the look of fire blue against dark walnut. I'm leaning towards wrought iron mounts and butt plate.
Brass might be better. What do you think brothers?

[rich pierce]

You can boil it and it will turn blue-black.