So the base of my base was one of Trumpeter's display cases, the 170mm square one. To this I added some very fine sand, airbrushed brown. Then I added several packs of Bregun's 1:72 PSP Marsden matting. This proved to be somewhat awkward, if you want to use this stuff then I recommend a smooth surface, the fine sand made it hard work.
I airbrushed another coat of brown paint over the whole base, a slightly lighter shade than before before drybrushing the PSP with Citadel Chainmail. Then the PSP was washed heavily with brown Citadel inks ensuring all the holes in the PSP were brown rather than silver. Oil stains were added by leaving a large pool of brown ink to dry.
Then I added brown flock around the PSP and green static grass. Wheel chocks were made from a wooden cocktail stick, the paper drop tanks were from my spares box (probably from an Academy kit).
Finishing touches included a tool box and tools from Bregun and the pilot figure which came from CMKs USAAF Korean War pilots set (F72 110). The CMK figure was nicely detailed for the scale, I highly recommend this set.
So far I'd say it's about 90% done, just a few more bits to add. So to finish this post, a few pictures with the P-51D Mustang.