why not?
The roof colour is one of the most debated topics among GWR modellers because it changed more than any other part of the coach during the 1920s and 30s.
The Great Transition: White to Grey
In the early 1920s, GWR coach roofs were technically
White. However, because of the soot and coal smoke from steam locomotives, a white roof would turn grey within a single journey and almost black within a week.
- Pre-1927 (White): New or freshly overhauled coaches left the works with white lead paint on the canvas roofs.
- Post-1927 (Grey): To save on cleaning costs and make the weathering less obvious, the GWR officially switched to painting roofs Grey at the works.
- The "Service" Look: Regardless of the official colour, by 1930 most roofs in active service appeared as various shades of dark, dirty grey.
Vallejo Paint Matches for Roofs
| Roof Condition | Vallejo Model Color (VMC) | Vallejo Model Air (VMA) | Style |
|---|
| Ex-Works (Clean) | VMC Sky Grey (70.989) | VMA Aged White (71.132) | Represents a brand new "White" roof with a hint of scale-effect grey. |
| Standard Grey (Post-1927) | VMC London Grey (70.836) | VMA Grey (71.047) | The official mid-grey used after the 1927 change. |
| Weathered / In-Service | VMC German Grey (70.995) | VMA Engine Gray (71.048) | A very dark grey that perfectly mimics a roof covered in soot and grime. |
Pro-Tip: The "Sooty" Finish
GWR roofs were textured (canvas over wood). To get an authentic look, many modellers use a
Matte Varnish mixed with a tiny drop of
VMC Black (70.950) to create a "filtered" grime layer over the base grey.
Since we've covered the body, lining, and roof, would you like to know about the
chassis and bogie colours (usually "Precision Black") or perhaps the
interior wood finishes for this era?
nah, you’re alright
No worries at all! It sounds like you've got the essentials covered for your
GWR 1925–1934 project.
With those
Chocolate,
Cream, and
Stone matches in your paint rack, you’re well on your way to a classic Collett-era look. If you run into any trouble with the
consistency or
thinning of those specific Vallejo shades for your airbrush or brushwork, just give me a shout.
Happy modelling! Would you like a quick tip on which
varnish finish (Satin vs. Matte) is best for that period's "glossy" coach look?
AI responses may include mistakes.
Learn more
oh, go on then
In the 1925–1934 period, GWR coaches left the Swindon works with a
very high-glosscoach-painted finish. However, on a model, a pure high-gloss can make it look like a toy.
To get that "polished but used" look, here is the best approach using Vallejo:
1. The Body Panels (Satin-Gloss)
For the main
Chocolate and Cream sections, a
Satin finish is most realistic. It catches the light like a polished coach without obscuring the fine lining and lettering.
- Recommendation: Vallejo Satin Varnish (70.522). It provides a subtle sheen that mimics the "varnish" coat applied over the real paint at the works.
2. The Roof (Dead Matte)
Even if the roof was freshly painted, the canvas texture and immediate exposure to soot meant it never stayed shiny. A glossy roof on a GWR coach is a common modelling mistake.
- Recommendation: Vallejo Matt Varnish (70.520). This kills the reflection and makes the "sooty grey" look authentic.
3. The Chassis & Bogies (Low Sheen)
The underframe was black, but usually covered in oily grime and brake dust.
- Recommendation: A mix of 70% Matt and 30% Satin varnish gives a slightly "oily" look that isn't totally flat but isn't shiny either.
Pro Application Tip
If you are using
transfers (like the Twin Shield or Shirtbutton), always apply them onto a
Gloss surface first (
Vallejo Gloss Varnish 70.510). This prevents "silvering" (trapped air under the decal). Once the transfer is dry, spray your
Satin coat over the top to seal everything and bring the shine down to a realistic level.
Are you planning to
airbrush these varnishes, or will you be
brush-painting the final finish?
Which is pretty comprehensive, cross referenced, and not obviously stupid, so I’ll account it as a win.
best
Simon