The controller panel is painted in gold but after the paint dried, fingerprints show up where it became a coppery colour. It looks very steampunk. The sleepers for the track are all copper as they were cut from PCB and soldered on to nickel silver rails, which tend to be a type of goldy brass colour.... I am mixing the scene by painting in greys and greens, and the locos and coaches will be in bright colours, but waggons and vans will be in dull colours.
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