Big victory! All the raised platforms are now built and full painted! What a project! The payoff was well worth it.
All of them laid out for assembly line painting. This made it easier to get consistent results across the whole set.
Here is the painting style I went for. Grey stone with highlighted edges. I used various thin washes of blue, green, brown and red over the stones. Grey is complimented by reddish brown wood and rusted metal bits. I added a bit of green/brown wash to the bottom of the platforms to simulate grime at the bottom. Should work well over water, as well as just dirty walls. Added a little bit of green flocking here and there to break up the grey and add some life.
A collection of detail shots for your enjoyment. I tried to apply various patterns for the stonework to make it more interesting. Along the side walls there are arches, broken bits, ladders, metal rings for tying up boats, drainage pipes, wall pockets with knick knacks. When assembling a board layout to play on, there ends up being lots of options for the look and feel.