That looks great Nigels. Did you lay it on its side or upright while the wash dried? I have a set of six bottles of weathering Vallejo in different shades, and a complete Vallejo Steam Engine Weathering System set all of which I haven't tried yet. In addition I have have a couple sets of Tamiya Weathering Powders that I have I only used the oily soot blend for Flukes wheels. With some various applicators I have everything to get started but, like you, I have to get the time to start experimenting. Have you thought of adding some different colored, shades of brown, washes in areas and maybe add some blackish around the trucks for some added detail?
EDIT:
Just noticed this attempt by Plarailfan at combining your hopper wagon with a plarail
![[Image: 16161797560_9f99128ef6_o.jpg]](https://s7.postimg.cc/f9r9mhdw7/16161797560_9f99128ef6_o.jpg)
EDIT:
Just noticed this attempt by Plarailfan at combining your hopper wagon with a plarail
![[Image: 7071.gif]](https://www.allsmileys.com/files/sweetim-texticons/7071.gif)
![[-]](https://www.blueplastictracks.org/images/collapse.png)