I tried out the new Vallejo Polyurethane primer (more on those later) on some AOBR marines that I use to learn how to paint marines quickly (harder than it looks). While I had the airbrush assembled and running I decided to try out zenital highlightning which has been covered in a bunch of tutorials lately.
All in all, it's a pretty straightforward technique and it yields really nice "blended" highlightning. Check Awesome Paintjobs tutorial on 13th Co. Space Wolves for an indepth look at how to do it.
The new Vallejo primers are nothing short of awesome. As you can see in the picture, the black is black, and the grey is a lighter shade of grey. Kinda inbetween white and the grey Games Workshop use on their plastic sprues. Which I find really nice. Colors don't get as muted as they do with The Army Painters "Grey Uniform".
They dry to a matte surface that's not chalky. Which takes paint really well.
What I really liked about the primers is that they're consistent. No more mishaps due to a bad batch of primer, blocked nozzles etc.
Oh, and of course, you don't have to run outside. \o/
Click the picture to see a full size example of the primer applied. Another layer could have been applied to the leaves without any significant loss in detail.