Decades ago, GM recommended, as well as mechanics at the time used to lightly sprinkle Bon Ami abrasive household cleaner into a running engine that hadn't seated the rings properly. This was usually associated with chrome rings because the surface was so hard. I've heard of the procedure, but have never talked directly with anyone that did it, nor witnessed it.
Here's a post on Speed Talk about using abrasives to help seat rings, during a build, as well as after an unsuccessful breakin:
https://www.speed-talk.com/forum/viewtopic.php?t=41147