well most poeple use vynel spray paint. I use it all the time at work when coverning scratches in new pleather seat (plastic leather). works great, You really dont need to sand just make sure you have a clean surface, the reason you don't want to sand is if the surface has a type of grain to it ,it will ruin the rest.
I amd going to re shoot my interior soon to give it that new look.
Hey rentascout thanks for helping help, keep it up.