why do people help make old cars look bad

INFO please.....My 71 slant Duster has its original paint, It will get a repaint this spring, but what's my grill's original color?????? was what? it is dirty and 37 years old. Look like it was maybe a satin black??
I prefer to make my cars look original. But to feed this thread, I feel people should be able to treat their cars are they wish. I f someone paints their car some hideous color and if they sell it to someone down the road, LET the buyer make it as he wants!!!! Right??