Painting on rubber parts?

Im planning a repaint of cybertron Thundercraker into g2 Hooligan, making a new head for it too.
I would like some advice before i attempt this on how to paint the rubber sections (fins and nose cone.)
I know enamels will never dry on rubber and soft plastic, but i have mainly being using testor and gameworkshop acrylics and was wondering if there were any considerations i should take into account before attempting to paint the rubber areas.
I would like some advice before i attempt this on how to paint the rubber sections (fins and nose cone.)
I know enamels will never dry on rubber and soft plastic, but i have mainly being using testor and gameworkshop acrylics and was wondering if there were any considerations i should take into account before attempting to paint the rubber areas.