It's supposed to be wrinkle and you can get a nice can of wrinkle paint at O'Reilly. Just follow the directions and you will be fine. I also used it on my non ralley instrument cluster and it looks good there too. They aren't decals either, they are pie pans that sit on top the air cleaner and they differ between Dodge and Plymouth on which is right for your car but since you say Challenger clone, the Magnum one would be OK.