Painting and assembly
Interior colors
The interior colors of the State Line roundhouse are not documented and available black and white photos offer no proof.
Several photos of New Haven roundhouses show a two color scheme of a dark color on the lower portions of the walls where dirt would most likley collect and a lighter color for everything above affording reflected light.
An interior photo of the then new Danbury CT roundhouse below is an example this two color scheme.
A dark gray on the lower portions and a lighter gray on the upper portions of the interior seemed to be a good guess for the roundhouse model.
Assembly begins by gluing the two color machineshop walls to the roundhouse floor below.
Exterior color
In a rare color photo of the prototype below, the entire exterior of the structure appears to be a monochrome light tan/brown color used on many New Haven structures, this scheme will be used on the model.
A different view of the model shows the chosen light tan/brown color applied to the exterior front wall of the machineshop.
The prototype roundhouse floor is 5" thick concrete covered with 3/4" of asphalt. An asphalt color was weathered and applied to the floor before assembly of the walls and roof supports.
Two exterior walls over the door openings are assembled with the painted roof supports between the engine bays.
The remaining engine bay wall, side wall and rear walls complete the sides of the roundhouse.
Next roof is next.