I traded for 3 NIB? revolvers all 8 3/8. A 48 with both cylinders a 586 no dash and this 27-2. All do appear NIB but the bluing on the frame of this 27 appears to be very thin at certain angles and almost has a case hardened look. the rest of the bluing is perfect. Could this be a failed attempt at cleaning? The grips are perfect and looking at the forcing cone very little use is shown. I was aware of this when I got it but will probably move it on as I have another without these issues. Any ideas just curious