No 4 sights - removal of blueing

[browningautorifle]

the sanding option

I think you have the wrong picture of "Sanding" in mind. How about if I said "Fine stone" to clean the surface...like a ceramic.

I keep a little bottle of talc in my range bag.

Well, his question WAS "Looking for some insight as to removing the blue finish from the face of a MkIII micrometer sight"...