Hmm... when I looked at it after cleaning all the clutch pad dust out, it is completely smooth on the walls of the bell. No nicks or scratching, just a little discoloration (burn?) and no warping either.
There are some minor scrapes near the center by the bolt as seen in the photo but not very deep. I'll pull it off the assembly and see what it looks like after flushing it off and post a couple new pics.