I have 2 so far, working on some others as we speak:
First is my beloved Monte Carlo, had to sell it a couple of years ago. Undercarriage was all upgraded, engine gone through, just had bodywork and interior left when it went down the road.
Second is our PT Cruiser. This is a diecast that I took apart and repainted with factory touch-up paint, not much done to it other than that. This one we're glad is gone, it was a dog! Overweight, underpowered (non-turbo), and the mileage wasn't that great.
Working on my current 1:1 project, '67 Chevy short step, both real and scale.