1866 uberti stains on brass receiver

[Pappy Hayes]

WOWZERS

What a Wild Ride.  Over hill, Over Dale, We Hit the dusty Trail and HERE WE ARE!!!  What Fun!!  Oh, The last question:

Pappy Hayes:  Just to reiterate Major 2 and above.  The differing alloys have created the rather interesting colours.  Total polishing is the only "fix" but the frame and side plates will always tarnish/oxidize to different shades.

can something be done to the other parts to darkened them

[Major 2]

Well yeah, vinegar fumes