Nice work dude! I like the crushy rust on the waggons..........how did you do that?

 

B

I adapted this technique.

What I would add is.

I started with grey wagons as you can make them as clean or as rusty as you like.

Paint the bottom half with frame dirt.

Remove the loads and paint them matt black.

I also painted patches, squares of rust on the wagons before applying the technique outlined in the video

And applied various different data panel transfers.

The technique shown above provided a great result. However the colours were a bit crude for my liking so I got my weathering powders out and toned them back. As well as applying the powders over the frame dirt on the base of the wagon.

Finally re insert the coal loads and hit them with a bit of matt black powder.