If you had started with a smoother finish, the results would've been more evident. That's why I put a 400grit polish on mine before starting, to better simulate brushed stainless steel. While I'm sure you think you've proven me wrong, it should still be painfully obvious that it altered the surface of the steel. It should also be painfully obvious that the marketing hype about them being non-abrasive is just that, hype. The change in luster and the black on the cloth is proof of that.
I never said it would open the cylinder gap to any measurable degree. I said it would alter dimensions. Especially rounding off corners, such as those at the chamber mouths. I'll leave everyone to look at the pics, read the text to come to their own conclusions. It's enough for me to know that folks understand that these products are NOT non-abrasive. If you want to take the chance for no good reason, satisfying only your own need for what you perceive to be "clean", that is your prerogative.
Personally, I treat my stainless guns and blued guns no differently. So if it removes bluing, it doesn't belong on any of my guns.