Im assuming you have the textured plastic trim.
You can paint it but it will never be smooth without a lot and I mean a lot of work.
You can make it white though. Krylon plastic fusion paint seems to work well according to some guys that have done it here.
Clean well, mask off the trim and spray. It will be shiny like the rest of the paint, but you'll still see the texture.
It does make a world of difference too.. I say go for it!