Thanks. I tried some ballistol and a nylon brush and most of it came off luckily. Guess it wasn’t too bad. Then used some bronze wool for the tough spots. So all good!!!He has a stainless gun. Check out Big 45 Frontier Metal Cleaner. You need to see if this is safe for stainless. Works great on blued guns. You can also look at fine 3M pads in the 300-600 grit range. follow the grain of the stainless. Read up and be careful. Start in small area first to test.
Came here to say thisFine bronze wool and a little oil works wonders.