What color do you paint your car models that you never use for paint?

over the years I've painted car models black or red or even blue.

 

This year back in January I painted a Ford Focus sports car green. Green paint I never use since its an out of the blue paint color that I never use.

Even with blue paint which is an odd color kind of to paint a car model

Brian McGuire Bruce McLaren Allan McNish Graham McRae