I painted up a bunch of windows and doors.
If the windows are cleanly done with no flash, and tiny spure connections I'll paint them on the sprue. these had flash, and the spures had curled, so parts overlapped other parts, so painting on the sprue was not an option.
Spray painting little parts doesn't work well, as the spray can blow the part away.
I use a work surface, in this case a scrap piece of sheet rock, on which I but some masking tape sticky side up I stick the windows onto that, and I can spray paint them without any flyaway pieces.
The roof material from the kits will not work, so it looks like the roof will be scratchbuilt, unless I can come up with a *****load of roofing material. this thing is big!
I have windows and doors glued in place now. two of the four kits I used were built or partially built, so some of the windows/doors are painted white. I will try to match the green of the rest of the windows by mixing acrylics, and then paint them in [lace by hand. that will be slow and tedious, but it must be done.
Next I need to paint the loading dock, which is not attached yet, and the elements of the front porch. I haven't built the store porch yet. I won't do that until after I have painted the sign on the false front. there will probably be a big sign across the top of the ridge line reading J. E. Patterson Coal and Lumber Company.