Thanks for posting your coaling towers Paul.
Very nice modeling.
Here is mine painted. I used burnt umber, raw sienna, two shades of grey and black
The first coat of paint is straight from the bottle and not thinned with water. This seals the thin cardboard that makes up the handrailings and such. I found in the past that without sealing and using water thinned paint, the glue would come unstuck and the railings buckled up some. We sure live and learn in this hobby.