I've been doing some digging on the net and found that it could very well be factory paint. There are a few sites with some really good information. Mine is a 1954 Tula Arsnal rifle. It would apear that some were painted all black. I also found a site that tells you how to do a trigger job. It has a link to another site were you can get a new sear if you screw up or you don't want to use the original. There are a bunch of other parts too.
This one is a gold mine for me:
later I added:
I ordered up a new sear and front sight pin set. I want to try some trigger work and from what I've read, all the work revolves around the sear. Check out these sight pins! This should help the sight picture a whole bunch!