I thought Patina was a belly dancers name. The black started out as a way for a non painter to get paint on a truck without having to make it look shinny and deep. Agree...Some trucks do have all the body work done and then flat black or satin. Some trucks are restored fully with that paint job. There is a small buyer pool for those.
As everyone knows, black is very hard to do. It needs a perfect body. Like Patina had.
I would probably leave an old paint job alone if it had nice original business graphics or Gov't emblems. That ain't patina. That's history/provenance.

Just my too sense.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn