Hi boggs, and welcome to the Forums!
Here's a display I made a couple years ago, which creates the illusion of the car being in-motion:
I built up the track suface with foam, overlayed with sheet styrene, and painted it different shades of gray, streaking it lengthwise. The white line is faded on either end, the wheels were turned on a lave with fine grade sandpaper. The wall is made of sheet styrene, both ends painted red, with red airbrushing where the red & white come together. The tires were mounted with the smooth side out, and the raised lettering blur was created by simply masking off the letters height, dabbing a bit of flat white in the middle, then smearing it in both directions.
I mounted this picture on the inner backside of the display case to complete the illusion.
It's a simple technique that creates an in-motion effect for the viewer. (especially if you take a picture of it outside in the sunshine!)
Just some ideas...
Take care,
Frank