I’ve managed a bit more progress on the coastal sections. After the paint/caulk coat dried, they were painted with a mix of blue, green and grey colours in a few layers, with more light blue added to each layer closer to the beach. The layers were “wet blended” so I painted each lighter layer before the previous layer had dried.
After the sea colours dried I lightly dry brushed the sea with a light blue/grey followed by white, to represent the wave tops.
And here’s a shot with the port. I left the sea colour darker around the inner are of the port.