Painted in warm black (Model Master Gloss Black tinted with Sand and Rot Braun) to match the finish of the original paint job.
Printing these cabs as flat kits does much to eliminate the terrace effect that can occur with 3D printed objects. The cab roof parts had terraces similar to those visible in the numberboards, but they were sanded out with progressively finer sanding from 320 grit to 1500 grit. The numberboards will have decals applied that will hopefully eliminate the appearance of the terraces.