I wanted to try out my two improvised paint colors on the completed part of the bridge structure. I first painted the vertical surfaces, let them dry, then masked them. Masking was not terribly fun, but it does produce clean edges. I then sprayed the horizontal surfaces and removed the tape. The colors are very near each other in tone, which is what the actual colors were like, but perhaps not so good for models. I plan to let everything sit overnight, and then I will take a good look tomorrow.
Here are the homemade formulas I used:
Vertical Surfaces: Tamiya Field Gray + Tamiya Flat White 2:1
Horizontal Surfaces: Tamiya Sea Blue + Tamiya Flat White + a small amount of Flat Blue 2:1:?
2 attached images. Click to enlarge.