Thank you, Alex!
Doors are now painted and the top stained and varnished. As you can see, the area under the arches is a darker grey, and we (Judy and I) are still wondering whether they would look better the lighter grey as the rest, but I am going to leave them as they are for a while, as they look OK.
As was mentioned before, another option is to paint something that would simulate depth, as perhaps a road into a tunnel (last picture, below). I can try this by painting a foam core board and cutting it to fit under the arches. However, the objective of the fascia is to hide the framework and not to get too fancy 
But now I want to work on something else (the Hidden Pass Mountain) so the fascia for this section will stay as it is. Judy is looking for material to make the curtains for the rest of the layout.
And the doors still open
The texture is like sand paper. I added an anti-skid compound to the paint to achieve the finer texture, and I like how it turned out.
This may be something to try later on.
Thanks for looking!
Alex
