I apply washes and dry brushing.
All the German armour (and a lot of the other nations)are GHQ 1/285.
They are all primed before painting. I generally use Squadron Signal books or Osprey for the colours.
Colours generally used are:
Burnt Sienna (or Rot Braun if you can find it).
German Armour Grey
Panzer Oliv Grun
The flags are GHQ air recognition decals. I use tissue paper and white glue to make a kind of mache. It lays over the armour quite well. When it’s dried, it’s painted with insignia red then the decal is added.
Most of the body painting is done by airbrush.