Bluing rust?

[Patrick Chadwick]

The Argentine is an ideal candidate for a gentle electrolysis treatment. It does not appear to have severe pitting. Electrolysis should remove most of it, leaving some blackish spots which are visually much less obtrusive, being effectively the same oxide form as "bluing".

After the electrolysis treatment it will look like a rifle with worn bluing, instead of a rusty rifle.
And then oil it and take it to the range.

Go here for some encouragement:

https://www.milsurps.com/showthread....hing+argentine