Hi Tom!
Thank you for the comments. I do a lot of scratchbuilt, and usually belts buckeles and retractors are among them.
The taillight is a section of a CD box, traced to shape (the W of the rear end).and sanded/polished until glass smooth. The red tint is a sharpie marker, but on the INSIDE surface of the plastic part. Light diffraction trought the part brings the red hue to the outside vertical surface. Try it: it's not very difficult to achieve!
CT