I've never used it to polish a feedramp. My Cratex tips and a Dremal have worked for that application.
I started using Flitz and switched to Iosso "GunBrite Polish" which Wal-Mart stocks.
The best use I found for both is removing the carbon rings from SS revolver cylinders and cleaning the bore. I use a Q-tip to apply the paste (lightly) on the areas I want to clean. Old T-shirt works to polish the exterior, a patch and rod for the bore. Does a pretty good job on lead deposits, though I usually use a ChoreBoy for that.
If you want to make a SS gun look like nickel, apply the polish, let it dry and use a peice of leather to remove it. A few evenings in front of the tube and you'll have a heck of a shiny gun.
Giz