Need Advice on RattleCanning Steelies Please

Alright everyone would really love some thoughts and advice on wheel painting. I've got some 16" steelies with Nitto TerraGraps that I've had on my T100 for several years. I painted them black 5 years ago and clearcoated and the finish held up and looked decent.
So anyway in the midst of switching around wheels on our 3 Toy 4x4s I decided to throw these on the Taco for a while because the current Duratracs are at 55k and vibes are driving me nuts. So naturally, I decided to clean em up and paint and go with a gunmetal type finish.
So I've powerwashed, dried, sanded and wiped down with alchohol.
Here's my question:
There are several rock chips obviously, but none with too much step-off thickness wise. My inclination was to go ahead and paint, but now I'm questioning whether or not I should prime first???
I've got self etching and filler type.
What say you TW? Advice please.......I appreciate input.

Oh and my priority is durability over appearance

 

Bump

 

I am no paint expert at all but i would prime first with self etching primer. If you want a really nice finish you could do self etching, then filler primer and wetsand before the topcoat

 

Ok. Thanks for input Evan! I think I will prime

 

Better safe than sorry! Goodluck

 

Temporary wheel swap. E load TGs from my T100 firewood wagon that just got done doing 10k on our Sequoia. New LTXs on Sequoia.
Hmmmmm, center cap or no?

 

DuraTrac Cs and alloys = 47 pounds.
TG Es and steelies = 75 pounds.
Both 265-75-16.
Think my mpgs will take a hit?