Thanks, guys...
Yes, I did paint the grille -- I forgot that I needed to touch it up before I took the pix! As far as I can see, you can't get a "full-chrome" grille on the F12. It seems to be either all-black, or black with a chrome front face, which is what this one is. I painted it all black, and then used rub n-buff to give just the front edge a silver coat.
bestest,
M.