I think it was a mistake to leave polishing so late in the module. It's best not put any tool marks onto the metal in the first place. However because all that was available to us for so long was filing, many of us (myself included) made a right mess of our rings in an attempt to make them look good. This resulted in much more buffing work than should have been necessary. Had we made a couple of rings and then immediately learned buffing and polishing, we probably would have had better results and wasted less time.