Another "step" along the way.
Chose flat red for the walls of the mill. Added a light overspray of darker color, Expresso saitn used with windows but hard to tell:
Chose a lighter color for most doors, Nutmeg satin
Large door with gray and spattering of Canyon Black flat
Set aside to dry before assembly. Will need to do a bit of weathering, but may look pretty good as is. . . .
Will probably add "glass" and then spray flat black from the backside.