Butch's Bore Shine is a great product. It will really take the fowling out of a barrel excellent. J-B Bore Paste is a cleaner to remove copper, lead, plastic, and any other fowling that might accumulate in the barrel. It will also take light rust off in the bore and leave it a nice shine. Be sure and put a good oil down the bore after using it because you have removed any seasoning that was in there. In fact they say to put the Bore paste into a bore, after you oil it first.