I've considered this kit, I shall enjoy watching.
Foxy
Body primed with vallejo German brown topped with some random spraying of the 2 darker colours from the vallejo rust range.
I say this with the intent of saving you future trouble. I hope you mean you used the Vallejo German brown as your first color coat over an actual primer. Never a good idea to use Vallejo over an unprimed surface on anything, certainly not a vehicle body.