Bought a nice LC about 10 years ago with the receiver in the white...partial renovation. Sent it to my gunsmith to be charcoal case colored. Came back perfect. Put it in a sock and stored it away. Took it out several times over the course of 5 years and then left it alone. Recently, I pulled it out again and all the color has gone black on it. You can still see some color on it but basically it looks like it was re blued. My gunsmith uses Galazan lacquer and he has never heard of this happening...have any of you?
Carl, You didn't mention it having Galazan lacquer on it in your first few sentences, then say your gunsmith uses Galazan lacquer. Regardless, no one here can determine why your case-colored receiver is now black. My only guess is oxidation in a questionable environment. Photos would be a great help.
JR