Any info on preserving patina?

[made2drag]

I have a 70 C10 that blue with a white roof and im digging the surface rust on the top of the fenders and top of the hood. I love the patina look. I have searched everywhere and I've seen many idea's, but I wanted to ask your opinions. I'd like to get the look of the pic below, while also not having to hopefully see the rust come back to the surface year after year.

I've seen:

CLR
Eastwood's matte clear
Wax
Comet cleaner then Wd-40
rattle can clear
furniture wax
just Wd-40

https://s-media-cache-ak0.pinimg.com...4e64c9d7d5.jpg

.
.
.
..