I started looking at the steelwork for the roof framing and it looks very (black) plastic…!
Good old Halfords Grey Primer to the rescue:
The grey primer is a very good basic primer that takes Vallejo paint very well, diluted as washes or full strength and dry brushed.
I wanted to represent old steelwork that had started to rust in places and just look old even though it is under cover and protected from the elements, steelwork in old factories starts to darken with age and any moisture or condensation will eventually start to attack unpainted surfaces.
I started the process by looking at a possible palette of colours:
Shown here are the colours that I ended up using - Vallejo No. 343 Dark Rust which is a reddish brown colour and forms the base coat which is applied with a dry brush technique.
Vallejo No. FS31090 Beige Brown and Vallejo No. 343 Shadows Flesh a dark red colour used sparingly to add highlights to the heavily rusted areas.
Starting point primer grey:
Vallejo No. 343 is to be applied as a first step using a dry brush technique.
After applying the dark rust colour the next step is to apply the beige brown colour – sparingly with a dry brush just to add highlights.
The addition of the beige brown starts to add an extra dimension to the old and rusted effect as shown here:
The plastic appears to be rusting…!!!
Very small amounts of Vallejo No. 343 a dark red colour is applied to some of the joints.
The girder assembly frames are attached to the roundhouse stalls.
![Image](http://stlandh.com/wp-content/uploads/2015/12/IMG_3177.jpeg)