I think that's actually quite common on new car models. The dazzle paint job makes it harder for the press to see the shape.

E.g.: https://www.bmw.com/en/automotive-life/prototype-cars.html

I don't want my car "harder to see" going at 100 miles down the highway.

Oh no, it's super easy to see, just harder to tell if it's a coupe or a sedan or whatever. New lines in the body panels get drowned out by the pattern, etc.

I always wondered if this still worked with a IR/UV camera too...?

I vaguely recall reading (probably in the book All Corvettes Are Red) that the C5 Corvette was driven around with Camaro body panels to fool the media.

I wonder how the face painting antics of Death Metal bands would hold up to face recognition software?

Sorry for being pedantic, but it's usually Black Metal bands that wear the face paint that you're thinking of :)