PANZERJAGER
......the correct primer is iron oxide, and the way I weather Is to actually wear away paint in certain areas to duplicate "real" wear and tare on the paint. So the primer must be applied 1st. so as to be Visible as i abrade the paint. Hope this helps...
I know you're talking about the paint but here's some interesting info about the two main types of iron oxide.
Fe2O3 is red and Fe3O4 is black. They change back and forth fairly readily and appearance depends on impurities and how it occurs. Steel beams as they come from the mill have a deep blue, almost black mill scale from surface oxidation that will rust to the more stable red. Some firearms were once browned (in the 1800s) by repeatedly rusting, rubbing off the loose rust, then rusting again and doing this repeatedly until finally oiling. Others were given a gray to deep blue finish by doing the same thing but adding the step of boiling in water to turn the red oxide to black.
When you look closely you can see that beautiful texture..........
made the hair on my neck tingle 
I just love the color you put on this baby. 
Even though I like to build dirty, I can really appreciate good lookin' work like this. 'Ya got something to be proud of here my man!
