Hi Bob, there is a new product out that my help, not saying it will but ,its called " blue wonder gun cleaner", Dixie Gun Works sells it for ,i think 9.95 , yes it is expensive ,for 4oz. tube , although i do not have any problems with cleaning or maintaining blacl powder firearmss , i do and own many modern stuff that i shoot the cheap mil surplus ammo out of , and now matter how welll i maintained or oled and scrubed they allways seemed to grow a little rust flaky, well then this stuff arrived for a blueing job that this company also sells and works well on small parts , but this stuff blue wonder gun cleaner is sweat my old mauser cleaned up and it left the bore bright and shinny and my Ar-15 bore took a real liking to it also the accuracy also came back ,this stuff according to the label, removes copper,lead,and powder residue, removes rust, without harming gun blue,leaves a chemically clean bore in minutes, if you decide on getting it read the directions, i had to do the mauser 8 times before all traces of junk came out and you will see a differece.
good luck buddy,
kevin