Chester Louis said:
Vincent,
Make a wash of India ink and alcohol, oh 1 to 10 parts or so, and brush it from top to bottom. It’ll get into all the nooks and crannies and cracks. When you have it looking the way you want, give it a clear over coat.
Chester Louis SA #64 Hampshire County Narrow Gauge
Thanks for the tip, I may give this a try on the small top roof section to make sure I don’t mess things up before attempting on the larger section!