Bought an old Winchester Model 94 in 32 Special and the rifles in great shape for its age except for the receiver which is missing the blueing and rough but not rusted or pitted. What can I do to make the receiver look better, and protect it from fruther deteriation? Duracoat? reblueing or any ideas? This is not a showpiece or a safequeen. Will doing anything ruin the value of this 1941 rifle?