grill color?

The black portion of the grille is semi-flat black. Suggest finding something that is self-etching or use a self-etching primer. Paint doesn't stick well to anodized aluminum without some kind of help. I used Krylon SF Black over a self-etching primer on my 73. For the silver parts, I cleaned up the aluminum and masked it off when spraying the black. I put a red stripe in the center of the grille using the same technique.