Good thread Tony,
Who dares weather their diesel like that !
Getting good reference material is essential to detailing and finishing a model. It's not something to be guessed at, we can only copy the prototype.
One subject that crops up often is weathered timber.
These are old scaffold boards of mine, that are easily 30 yrs old, have weathered naturally outside, this is European Whitewood a species of pine.
They could just as easily be the floor of a wooden wagon.
The basic colour is almost a silver dirty white and greys.
Col.