Lance, I have never tried pastels but as far as my understanding, delicate airbrushing with several coats of shading colour strongly diluted in clear lacquer does indeed give more subtle and uniform results. Give it a try, the trick is indeed in the dilution, so that one needs 3-5 airbrush passes to get the desired result. I found a drop of Vallejo Marron Beige in good ten drops of clear gives the fine result. With smoke the proportion of black to clear is even smaller.
Thanks, Dan!
And now, ladies and gentlemen, let me present - Sopwith Dolphin monoplane
You may notice, that I have repainted the Vickers cooling jackets into Battleship Grey. It was rigthly indicated to me by Buzby, that WNW call for that colour. I was surprised at first but then checked the Cross and Cockade monograph and found a couple of photos clearly indicating this. As we well know, routine is dangerous.