The sides of this van are similar on texture to the ends, although I have to say that the vertical striations on the plank surfaces are not as noticable. The use of a wash was rejected because of the reaction when doing the ends, so the plan was to use pigment(s) on one side and thinned wash applied like paint to the other.

The starting point:

A thinned wash (MIG Productions Dark Wash) applied with a damp (as opposed to wet) wide flat shader diagonally across the side:

The opposite side, with MIG Productions Dark Mud pigment applied using a filbert:

In retrospect I should probably have used Dark Umber for the second side. There is too much of a yellow tinge to this result for my liking. I still can't 'unsee' the diagonal striations on the underframe.