What part of the grille do I black out on a 68 B'cuda?

Ive got the standard grille. As a kid, I remember seeing one with a blacked-out grille and it looked so sinister that it stuck in my head for 35 years. Due to the deep grille recess, i can see that one wrong move with the spray gun will make it look goofy and amateurish.

So, do the grille surrounds stay silver argent, and the grille itself blacked out? vice versa? the whole thing? not at all? help me out.

Any pics would help.

thanks.