ive used duplicolor on a few cars, and it usally works great. just make sure everything is super clean and clear of any grease, oil, armor all and all that stuff cause if its not totally stripped of the paint will not stick at all, and that will just make a huge ugly mess. simple green is a great cleaner for interior parts, even on stuff that looks clean you will get a TON of gunk off, you will see it on your rag, dont be alarmed. lol