Painting 3mm
Painting 3mm miniatures is not exceptionally difficult but it requires methodology.
Here is what I do:
I first prime everything in dark brown. I am not quite sure why people still prefer to prime in black but I find brown a less harsh base color to work with as a base. Then you splapchop the minis and use contrast paints, et voila!
Here, I used Vallejo's Sick green for my French Nato base colour. It is ugly at first, but as with many painting techniques, one needs a bit faith in the final result.
Then, I painted the four corners of my vehicles with charcoal grey and one diagonal band.