I went over the hood and the trunk again this morning. With her dry, you could see spots that had not gotten as much attention as the rest. I waxed her after, in hopes of keeping her this way longer.
Re-comparison, followed up with the final product:
She's glossy as all heck now. (With the unfortunate side effect that the imperfections stand out more)
I had some time left, so I attacked the wheels with my polisher and wheel polish:
I'll finish them off with my dremel and more wheel polish at some point, and I'll finish the paint off soon with a re-spray of the black.
I didn't find the iridium plugs, but I did come across a 4-wire O2 sensor pulled from my '98 Firefly turn EV. I probably have 3 laying around. I went "OOOooh, 'free' parts!" and went to see what was involved in hooking up a 4-wire sensor. I found this how-to and helpful explanation:
Bosch 4-Wire O2 Sensor
...in which the writer has/had issues with how his engine ran after putting on what appears to be the same header that I have, and this was his fix for it. It might explain why she runs better/smoother for a bit after a hard run...the o2 sensor is finally hot enough to work properly! (I was just going to do a 4-wire to help with emissions/mileage while the engine was warming up)
I think that's what I'll do tonight. There's even a how-to for bench testing the heated O2 sensors. Excellent.