I'd opine that cleaning cylinder faces is a futile if not dangerous task...dangerous that is to the accuracy of your piece if you screw it up. Like the barrel crown, the cylinder throat openings, and the barrel's forcing cone; all are critical to the gun's accuracy. Nicking any of them, or merely rounding off the edges can ruin your gun. Cleaning rods and over use of super cleaners have ruined far more guns than are ever "shot out".
Cleaning a gun to ensure reliability is one thing, excessive detail cleaning is something else...a bit like a heavily chromed Harley that's kept in concourse display cleanliness...the question I always ask is, "do you ever get it out and get some bugs in your teeth."
Best Regards, (and forget about your cylinder faces), Rod