Rustolium in Satin finish is what I used on the "8 350" and "CST" emblems. Also touched up the unpainted rivets on my replacement grill 15 years ago. The oil based pain still looks like the day I painted it, was easy to apply using hobby brushes and perfect match on the grill.
Pictured is the semi-gloss as reference but I suggest using satin so you don't go too glossy or dull (chalky).
