For the car case, usually police shoot their radar at your license plate since it's a flat reflective surface anyways.

And at headlights otherwise. But if your car has popup headlights and no front plate, and you paint it vantablack, you'd probably be close to invisible to police LIDAR (laser) guns. I'm not sure what the reflectivity of this stuff in the radio spectrum is though.

Do the black and yellow California plates still possess reflective properties?

Id like a baseball cap, painted with vanta black, but with a cheese-cloth style net also painted with vanta black, which can be worn down like a bee-keepers hat, such that facial recognition cant be used against me.

Also, i am anouncing right now my freedom to destroy any facial recognition cameras i come across. Its my fist amendment right to not be supressed with facial recognition because i am free to say anything i want, and using facial recognition is a violation of my first amendment rights.

I love this line of thinking!!

Also, if i were to dimple an an entire plane’s body like a golf ball, and paint it with this... how stealthy would that be?

Oh, about as stealthy as a metal golf ball, painted black?

Put it this way: If you shine a flashlight at a cosmetic hand mirror, does the flashlight shine back and hit you in the eyes? Now tilt the mirror so that the flashlight doesn't blind you.

Stealth surfaces are supposed to work like a tilted mirror.

Now imagine a polished chrome golf ball. If you shine a flashlight at it, you'll still catch a bounce from the flashlight reflection, even if the surface is dimpled.

Compare the chrome golf ball's performance to an icosahedron faceted with mirrors. The faceted platonic solid is less likely to shine the flashlight back at your eyes, depending on it's angle of rotation. And a dodecahedron would perform even better.

Thats not exactly accurate. Those nanotube coatings are optimised so it traps the light entirely

Just send the "reflection" back at the donuts connoisseur before the real reflection does and your objective has been reached. Ready made devices for exactly this purpose exist and are dirt cheap. While we're at it, the photonic equivalent can be beaten by means of special reflective coating. One that whites out the entire photo using the received "flash". Needless to say, this is also widely available & dirt cheap.