Cool it looks nice and smooth. Have a good look for tutorials on pre-shading and zenithal highlighting on youtube for ideas on how you can use an airbrush to improve base layers (beyond awesomely smooth). I'm yet to try this on an army wide scale my self, but I'm looking into it for new
BA units.
It's really easy to practice as well all my Tau tanks have pre-shaded panels on the primer layer as I knew the top coats would eventually hide it all it was a pointless step for the finish of the tanks but was invaluable practice. I used Zenithal highlighting on my Inquisitor scale Deathwatch Marine..... That how I know I really need a better air brush to really pull off the effect.