Well tonight I decided to paint my viaduct wall sections, since I am waiting on scenery material from Scenic Express to arrive for the sawmill pond.
Here is a photo of the area this is going to be installed outlined in red. It covers the gap between my 2nd level of the layout and the 3rd city level. On the second level under the city I have a hidden storage yard. I only want this area to be visible from this view of the layout. So I had this wall sections laser cut and brick etched out of hardboard. I may add some strips about a inch wide brick sheet to the arch openings to give the wall some depth. In some of the other arches openings will be filled in with brick sheet to hide some of the 3rd level supports.
Here are a couple photos of the lasered hardboard
Here shows the whole wall section
I painted the brick with white, gray & black primer and then used 4 craft paint colors applied with makeup sponge wedges. Adding a little bit of each randomly and dabbed the sponge in it to apply to the wall . Here are some shots.