Updated 9/22/2018 (PM):
After seeing how well the "shorty" pier turned out, I've decided to paint the OH side pocket pier the same color, although I will add more of a darker wash to it afterwards. But before I could paint, I needed to do some prep work.
First, I installed the navigation warning lights (Evans Design U3TR - slowly flashing red 3mm LED bulb). The light is supported by a short piece of shrink wrap and taped in place on the pier. The wires go down through the hole in the pier and emerge below it. Eventually, I will extend those wires. When the pier rests on river bench work, I will drill holes through the river panel, and connect the wires to the 12VDC accessory bus.
Next, I glued the spacers in place. They will support the floor of the pier, which in turn will support the bridge pedestal and bridge shoe.
The floor lays on top the spacers.
This photo shows both of the completed navigation light installations. Note the wires at bottom of the pier (indicated by the craft sticks).
Finally, I masked off the top ring of each arm and the lights.
Now we're ready to paint.
More when I know it. 
George
