I am building a '69 340 Barracuda that came with the red plastic wheel well liners. The rears are in great shape but are faded and the fronts both have a small area where the tires rubbed through. My main question is, does anyone have a recommendation for dying or painting them? I would like to bring the red back as they are kind of pale.
As far as repairing the areas that were rubbed through I am assuming fiberglass would be the best choice. Any other plastic repair suggestions?
Thanks!

Your first course is to determine the type of plastic they are constructed from in order to determine the proper material and welding/bonding techniques to refinish them, I know of them, but I haven't been fortunate to throughly examine one/set

There are various burn tests you can perform if your unfamiliar with identifying various plastic compounds

I'm surprised these have not been reproduced by now. I've seen one set of originals on a B-fish in a wrecking yard in Phoenix back in the mid 80's. They were all broke to heck, & the material was a thin pliable plastic. You could get these on '67 GTO's as an option I believe (I know they were available on GTO's from the factory as an option - pretty sure it was for 1967). I doubt there is much chance a set of originals could have survived all these years unless they are on a real low-miler garage queen.

The plastic type is either Polyethylene or Polypropylene. These materials have very long molecular chains and are inherently VERY resistant to chemical penetration, accordingly, paints and glues sit on top of it rather than penetrate it. So, most repairs are done by plastic welding which basically melts the two edges and adds more of the same material in the crack. Once welded it needs to be sanded smooth to hide the welds and then finally painted. A flex agent added to a quality primer made for painting urethane bumpers would probably give the best results.

Good info, thanks!
I haven't done any plastic welding before and I will have to add a small amount of material to the rub through areas. I think they are worth saving if I can come up with the right process to do it. Fortunately the rears only need paint to look great.