I was able to get a bit more airbrushing done on Smaug. I'm trying to build up the colours and highlights, but with such a huge model it takes a while. The wings especially seem to suck in the paint with little to show for it.
Its tricky trying to get the right tones of red without going orange and pink. I gave the magenta ghost tint a shot, but it came out too pink, so went over that again with one of the mid tone reds.