Changing color on interior parts

I know this has probably been asked but I could not find it by using the search feature. (but did find a great topic about using Simple Green to clean the vinyl interior parts and that worked fantastic!)

I have some interior vinyl parts that I'd like to change the color of, going from light green to black. I'm not sure what product would look closest to an original part. I have heard the following:
Dupli-Color is too glossy or too flat
Mopaint is good
SEM is good

I would like to get SEM products because I can buy them locally but I'm not sure if I should get the "Color Coat" or the "Classic Coat" and they have about 4 differnt colors of black.

Any input greatly appreciated.