71 Roadrunner Grill Finish

We are in the process of finishing up our road runner and it's time to detail the grill. I have seen people with them totally blacked out and some that look to have what appears to be a argent silver around the edge. Which is correct and does anyone have recommendations on paint and prep technique?

The 71 RR/GTX grills wher moulded in black plastic with the flat horizontal surface painted with what I belive to be {correct me if wrong please} med/light argent silver

I sent you a P.M Brian

Thanks for the info! The originals had already been painted black (very poor job!) so I couldn't tell what they were like originally.