Knocked out the seats and the headliner over the last week! I'm really, really happy with the way the seats came out. I ended up not pulling the cover all the way down on the reclining mechanism side. That meant I didn't have to cut anything, and I figure if something comes loose, I can always go back and pull it down. Everything got a coat of black, including all the bolts, and the seats look better than new -- not bad for my first upholstery job. Only blemish is the missing mechanism cover. I may try to mold something at some point.
And the headliner, for all I was dreading it, actually turned out to be not that bad. I made my own from perforated headliner fabric that I backed up with 1/4" foam. I was too busy running around to take pictures during installation. But what I did was masked off an 8" strip down the middle of the headliner from front to back and the matching strip on the roof, then sprayed with contact cement. The middle of the headliner was marked with tape, that I used to center it in the car. Applied the headliner from the middle out, stretching any wrinkles along the way. Then I just let the edges hang down, sprayed glue on the headliner and roof on the passenger side and continued working towards the edges. A panel removal tool tucked everything under the edges. Repeated the process on the driver side. Sweaty and uncomfortable work, sure, but nothing that's going on my Never Again List.
Tomorrow, seats go back in!