[QUOTE=Great-Kazoo;2093811]This is what you're looking for, if you call around the metro area. My advice, based on years of using it. After you get the desired bluing (following instructions) Rinse with water, wipe dry then oil.

https://www.brownells.com/gunsmith-t...-prod1112.aspx

You must rinse with water. Oil will not neutralize it. It can keep working and eventually turn it brown. Even if you oil it. This applies to most cold blues.