it's hard to say with out actually seeing it but.. you can either buff , file ,sand, rebuff , and reblue....or find and install a replacement cylinder or , just live with it..
it's difficult to say what caused it in the first place,, but i have seen gun's that have spent most of their lives sitting in a dresser drawer.. looking just like the day they came home, except where the wood had contacted the metal..moisture from the wood had caused the same condition you discribe.
it's difficult to say what caused it in the first place,, but i have seen gun's that have spent most of their lives sitting in a dresser drawer.. looking just like the day they came home, except where the wood had contacted the metal..moisture from the wood had caused the same condition you discribe.