Dan.... hate to break the news but it won't last long. Most of the paints used are not used with UVA/UVB rays. Did mine 2 times... in side and out and still faded.
Best bet.... get a hold of Larry... Tearoffguy and have them tinted. Way better and will last 10 times longer. And I don't recommend doing it from the inside. They are a bitch to get back together. Trust me... Wait til you see mine in person. Should be getting them back soon. Same goes for film on the fogs and heads.... Well worth the money.
Just my 2 cents brother.... looking out
PS... here is a link to what Larry did for mine.
http://www.sr20-forum.com/cosmetic-modifications/20297-head-light-tail-light-film-15.html#post599672