George is our pipe restoration guru
I get it, and I talk with George weekly on a Zoom call, and often ask him questions about pipe restoration. I fully realize that George is the expert. In fact, a few weeks ago we were discussing a 'restorer' on ebay who sands mouthpieces down to smooth rounded crap, and who adds curves to the outsides of his pipe rims
- I talked with this ebay seller and explained George's views on this, and the guy ended up on our Zoom call, prepared to learn. I checked out some of his recent mouthpiece 'jobs' and they looked much improved, so he listened.
But...I still would never tell people on a forum like this to use a brass brush to repair stampings, any more than I would suggest they use sandpaper to repair rims. Not without providing very specific instructions (which you have now done). I use a brass brush to scrub rusticated rims that have bad carbonization, but other than in this sentence, you won't see me recommend such a technique to others. But if George has a video, go watch it.
But to be honest - I personally have never used a brass brush on a stamping. Now I will certainly go find an old abused stummel and give this a shot. So thanks for posting that video link.