De-oil and neutralize. Then re-oil heavily. Then just keep it oiled going forward.
I do not think that all rust blue solutions say to use baking soda in their instruction steps, but anyone who knows better will do so as a precaution. I personally use Mark Lees bluing solution at it is very fast acting and the instructions specifically say to use baking soda after the last cycle.
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B. Dudley
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