There actually is a concept car with technology in process for a BMW that can change colors. Too bad for police chasing from victims’ descriptions.
But humans could try this if the tech guys could figure out a way.
BMW car:
The surface coating of the BMW iX Flow featuring E Ink contains many millions of microcapsules, with a diameter equivalent to the thickness of a human hair. Each of these microcapsules contains negatively charged white pigments and positively charged black pigments. Depending on the chosen setting, stimulation by means of an electrical field causes either the white or the black pigments to collect at the surface of the microcapsule, giving the car body the desired shade.
Whoa - that’s not just “black face” - I don’t even know what that is!