Thanks for the suggestion. I heated up with a heat gun on low setting, and it did the trick. Only problem is my brass punches bent and therefore slipped and left some brass tracks. Copper brush and oil works with light surface rust older blued guns without destroying the finish. I guess I’ll try it on the brass marks and hope for the bestHave you heated it up? There may be some loctite smeared in there. Hairdryer should work.