grnd93 has the best idea.
The trouble with painting them is that they flex. If you don't have the right paint & prep products, you'll end up with a hot mess on your hands. Otherwise you could prolly take them to a body shop and have them done for good looking, lasting results but they will still have that texture and it may look a bit peculiar.
06 Rubi with some sort of double ended, chrome knobbed, cross threaded, infinitely adjustable, frequently breakable, worn out flammywhammers zip tied onto it.
It used to be a jeep thing... til that sh!t broke!