15. "RE: (OOTR-12) TFLF Chapters 9-16"
In response to message #14
Appears to be "two-sided" paint - black on the inside, so it just acts like tinting (and vision tends not to focus on it, since the light from outside is so much more interesting) and colored on the outside. Most likely the paint is actually on clear vinyl, stuck to the bus like giant colorforms.