The Seebee looks great! Nice dio. I was just reading about these birds in one of the aviation rags.
the Baron
For the windows, I wondered if you could have painted the inside as an alternative, since there's no interior detail, and mask and paint the exterior?
That's an RC car trick. Some of the bodies for RC cars used to be clear acrylic, and you painted them entirely on the inside, so it took creative masking and careful planning.