Usually paint thinner or mineral spirits work to get the dried up grease stuff off.
I do remember one time having a devil of a time with a Russian Mosin. They used some kind of a fish oil grease like substance. Nothing would touch the stuff. I eventually found that acetone would clean it off. But even then it was tough work though.
I do remember one time having a devil of a time with a Russian Mosin. They used some kind of a fish oil grease like substance. Nothing would touch the stuff. I eventually found that acetone would clean it off. But even then it was tough work though.