Thank you!
The vacuum-formed windows and the headlights were quite yellowed so they have been soaking in peroxide and sitting in the sun for over a week. The windows look much better but the lights have not changed as much, although they are a little clearer.
I did the seat material with a light dusting of black over red as the real fabric has a subtle red and black pattern. It looks a bit harsh in this lighting but through the windows it has enough contrast to be visible. I made the shifter out of part of the oversized PE windshield wiper.