A bit of detail can go along way to improve a model car like this 2010 Corvette C6-R by RMZ city (1:36scale)
The headlight piece was de chromed and light details were added back in with a sliver sharpie. Also the extra bit of red plastic from the taillights was trimmed away from the fan located in the rear and inner part of the lights were covered up by silver sharpie to brighten them up and hid that you could see light peaking through at certain angles from the sides. I also added the numbers to bring it back to a race car feel.
How the car originally looked