I used Vallejo Surface Primer Russian Green (73609) for the primer coat. The end result looks fine but getting there was touch-and-go.
I sprayed the primer straight from my airbrush with no dilution. Now, I've used other colors of the Vallejo surface primers on other models with no problems, so it came as a surprise when this primer beaded-up horribly on the flat parts of the hull. I know that the beading is a sure sign of a "dirty" surface (mold release agents, oily fingerprints, etc.) but I had washed this model, as usual, with a solution of water with a little added dish washing detergent. At this point I thought, "What the heck" (or worse!) and just continued spraying until the surfaces were covered. I let the model dry, paint pools and all, overnight. Much to my surprise the next day, the paint had totally snugged down to all surfaces with no obliteration of detail. Quite a testament to the Vallejo Surface Primers.
The resulting color is a bit dark for my taste, but it will serve as shadowing and I will follow it with a lighter base and then highlighting.