I'm now officially fed up with trying to keep the carbon build-up from the crown of my rifle! I'm sure the moderator doesn't help, but that has to stay. I'm also worried that I may damage the crown! Grease seems to burn away after a few shots.
Should I just leave it?
We used to use 'Jenolite Jelly' which is a phosphoric acid rust remover on the gas plugs of the old SLR rifles so I'm wondering if something like that might work?
Any ideas what to do or use?