Center flat black hood vinyl decal/sticker?
Neuner
Old Time Jeeper
It really wouldn't be that difficult to mask off the center and rattle can a black center. But how long would that paint last....
If you're still considering the paint option, before I could decide what to do with mine permanently, but with still needing to take care of the surface rust and bad paint, I painted mine with a small sponge roller and Rustoleum Satin Black High Heat paint. I wound up loving it. I get lots of compliments and have decided to just keep it that way. It still looks great after 3 years in the hot Texas sun. Only thing is that it's textured surface which you may not like or want.
I initially tried to spray can it but I really didn't like the streaking it had.
In my opinion, the satin offers the perfect sheen. I has just enough of a coating so it doesn't mark up like a flat black but you don't get a glare off of it from the sun like a gloss.