I used paint thinner to soften the cosmoline on a Yugo SKS along with a bristle brush & lots of elbow grease. It’s a motherbear getting all that gunk off.
As for BATFE knowing how many guns I own based on 4473’s, would somebody quote me the Federal statute that says I am required to report selling any of them?
Yes, yes, “universal background checks” will achieve that but it hasn’t happened yet.
Hmmm. Yeah, the Yugoslav army seemed to have an abundance of cosmoline on hand. *sigh* I was hoping for something easy. Those kinds of chemical wrack my lungs anymore.