Hi Carl (@clipper): The pamphlet that includes the markings and colors is very cool and set up like a manual for the actual armoured car. The colors are a little generic, such as "dark green". So, not much help in specific colors. Info on WW1 colors online is very sparse also. In the end, I will probably end up with "what looks right". Notice I say that as if I knew what the colors of a WW1 Russian armoured car were supposed to be. :o)
For mixing paints, I use clear trays with depressions that I got on Amazon a while back. It works great for testing colors and mixing small amounts of colors. For larger amounts, I use the small solo cups you get condiments in at some restaurants. I got a box of 1000 at Sam's several years ago for just a few bucks. I use them for everything because I will probably never be able to use them all.
2 attached images. Click to enlarge.