Here's the truck with track on the tray. We had a fan running and blowing cool air under the plastic cover the whole time to keep things cool so the track wouldn't warp under the hot sun:

Some before/after pics:




The next plan is to cover the bottom of the track table completely and paint it all white, however that will have to wait for the completion of our power-improvement plan of soldering and wiring the second half of the track.