fiberglass interior?

you might want to remember to add some flex additive to the base and clear for the pieces that might shift a little either when you are putting them in or while the car is moving..........or else it can crack. also some brands like Dupont chroma clear and base has a little more flex to it. ppg also makes a plastic primer system. Trevor

good calls on sanding out the texture and adding flexibilizer.  I think a lot of people are mislead when they see shiny interiors.  Just because it's shiny doesn't mean it's fiberglass.  The best way to give your interior that shiny fiberglass look is to spray the parts with a high build primer, and sand them till they're smooth.  Repeat the process untill you're satisfied, and then paint and clearcoat the parts.