I have the race red color on my 2011, and prefer the black rocker panels for contrast. However, I see that the OP appears to have a black Mustang, so they offer no contrast on this car.
Plastic can easily be painted. My son works as an adjuster at a body shop. They do this often. It just requires the correct prep work, and a flex agent added to the paint.
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.