Paint help for 70/71 dart grille

I have a nice center section I bought. The grille is made of black plastic. The back and all of the black which shows in front is just left the natural glossy black plastic. I also have the two headlight bezels and they need to be worked. They also are gloss black plastic, but somebody sprayed the front with a flat black spray paint where the black is. I need to remove all the paint on the front and just leave the batural gloss black and then mask and paint the silver. Has anybody done these grilles with great success? How can I strip the paint without destroying the plastic?
What is the best paint to use for the silver that will stand up well. And also, is the black on these grilles suppose to be just the raw glossy black as my center section is?