I've not gone through the process yet myself so other guys can probably do better with specifics, but I can speak to the importance of due diligence. talk to every customer you can find, check the quality of their other work with your own eyes... aka: do your research. It's like everything else on your truck but times a million since it's so visible, expensive and (hopefully) permanent. anyone can pull the trigger on a spray gun, you want the guy/gal that knows what they are doing and takes pride in their work.