Plasti-kote makes a paint called stone touch that looks just like your Zolotone , its semi durable nothing like the Zolotne but the look is almost identical.
I've tried several rattle cans to get a good finish and have found the rattle can bed liner to work great but if you want a differant color than black or white then it has to be repainted. I've got a new Dura-cote kit that I'm playing with and I'm wondering just how ell their paint works on the bed liner.