I'm also led to believe that the 'sarcophogi' were finished inside the catacombs...some, as Childress relates, don't agree with this. If finished where they sit, how was the perfection achieved? Not by hand according to Dunn...and there are over 20 of them? How long would that take with chisels or whatever other tools were said to exist at that time? Truly a mystery and not one where quartz tipped toothpicks comes to mind as a solution.
I would appreciate Xaviant's comments on this either here or in a different thread - if he's well versed in the subject that is. I don't know if he is or not.