First of all does anyone know where i can source transfers/ decals suitable for wdlr wagons in 1:76?
Secondly does anyone have any suggestions as to what humbrol colours are suitable for British and German uniforms in 1917 and also humbrol colours suitable for british artillery?
Decals: If you have good photographs, you could employ the services of Black Lion Decals to make a custom order. I can't think of any "off the shelf" sets. Our friend Baldwin would know better than anybody.
Paint Colours: I can guarantee you will get everybody saying, "Colours varied", and "You can't rely on photos", and "use your judgement".
I know nothing about German colours except they were greyish greenish, but I would lay money on everybody else knowing everything about them, down to what Helmut wore on Tuesday 14th May, 1915, as he sat down to Lunch.
For British colours, I have been experimenting, and I am using Reaper Master Series Green Ochre for the basic uniform colour. Using this handy colour translator, Reaper MS Green Ochre translates to Humbrol 93 Desert Yellow, more or less.
I have a good friend (singular) who uses Humbrol 29 for British uniforms. I have tried it, and personally, I think it is a little too dark. But it's a personal thing, because...
...you can't rely on photos because colours varied, so you should use your judgement.