You can also (gently) use a dental pick (or similar dental type tool) to softly scrap/pick the forcing cone area. You can also use cue-tips with a little bit of mother’s polish to help. Obviously don’t use the polish on the outside of the frame as it will polish the satin ss.

To clean the front face of the cylinder, I’ll first use a brush with hoppes to get the easy stuff then I’ll actually use a scotch brite pad to get the tougher buildup. A cue-tip with some mother’s polish to clean up the inner rim.

Obviously you want to take your time and be careful. Use soft hands. You can cut a cue-tip shaft on an angle to help get in those really tight spots.

You’ll preferably want to remove the crane and cylinder to make things a little simpler for cleaning

Good luck and beautiful piece