Looking to repaint the Demon (pic attached). This car is wearing it's original paint but I am going with a color change to Sassy Grass. Can I just do spot body work and then scuff/prime/paint over the existing paint? If so, is it really that much of a time saver or should I just sand it down to bare metal? One twist, the quarters have had Pam cooking spray and WD-40 in them to help with rubber from burn outs.

Not looking for a perfect car but a really nice daily driver with paint that looks as good as a new car.