i had similer damage under the wood on my mosian too. you need to get rid of all the rust first steel wool isent going to cut it. i went after mine with a steel wire wheel on my drll.. if the rust isent deep you can also file the area smooth with eithor a good old fashion file or a belt sander with 80 grit sand paper. then hit the area with some blueing. hasent come back yet.
Last edited by robertusa123; 03-07-2013 at 12:30 AM.