from my personal experience doing custom car audio installation for 14 years, the only thing i would use is SEM products. i would use the SEM soap to clean the sufaces then depending on what type of material you working with, i would use one of thier vinyl or plastic preps. once youve done that, your ready to use one of thier color coats. dont rush it and do several lite coats for the best results. just know that over time you will probably have to fix areas that get scratched or worn through but that is to be expected when you dye and panel in a car.


here is the link to the SEM website http://semproducts.com/