I too have the black lips from smoking...sure, not everyone has this problem. I have inquired about this matter on several sites but not much help has come from it...
Moneybags, check out indiaparenting.com, type black lips into the search bar, then go the title lip sync (I think), they have some good recomendation.
Yea, not all smokers (weed or cigs) get the lip problem (PS- its not from resin), I'm still trying to figure it out. I have an appointment with my doc next week...I'll write back as to what he says....