Imitating a vinyl top

Regarding truck bed liner - I vote no.
My son has a '98 Dakota that came with a sprayed in Rhinoliner. Black, but it looks pretty gray to me. That was after 6 years, since he has owned it he has kept a tonno cover on it - but it is still gray.
I have a '99 Dakota that I had another brand of spray in liner applied in a forrest green. It has always had a tonno cover, but on the edges where the cover doesn't sit - the green has faded to a sort of light grayish green, maybe snot green... and it faded to this in fairly short order.

Maybe the mix is better today, but those two examples of late '90's bed liner didn't hold color.
C