Welcome! Agree it has been hard chromed, which would make it nearly identical in appearance and rust resistance compared to a stainless gun. This was a popular modification back in the '60s and '70s when stainless guns were relatively hard to find.
S & W will not work on a gun of this vintage but there are many competent gunsmiths who will. As far as finish defects about as far I would go would be a very light abrasive and light pressure.
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Alan
SWCA LM 2023, SWHF 220
Last edited by murphydog; 07-24-2020 at 09:16 PM.
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