The ad copy for Bon Ami and the logo on the package showed a newly-hatched baby chick, and the slogan "Hasn't Scratched Yet!" I believe the very mild abrasive material they used was the secret to "ring seating" on glazed cylinder walls by mixing 2-3 tablespoons of Bon Ami with half a pint of lightweight oil such as MMO or even Diesel fuel, and dribbling the slurry down the carburetor of a warmed-up engine running at fast idle. The idea was to create a little scrubbing action by the piston rings to help stubborn rings seat. Some mechanics in the 1950s swore by the procedure- - - - -others swore at it! As always, "Your results may vary!" Just thought I'd pass on a little old geezer trivia to the collective!
Jerry