I finally got around to installing the correct muffler on the car. I've had it for months.
I also repaired the minor crack in the rear bumper cover while I had it off. Tomorrow I plan to repaint it before I put it back on. My painting skill is marginal; I tend to do a lot better at wet-sanding and polishing to correct the finish than I do at getting a proper prep. If I mess it up, I can always take it to a shop after.