There's a story there. I spent so much time filling and sanding the bare wood roofs while attempting ot hide the grain on Davids first coaches with these roofs that I suggested he glue paper to them in future to save me a bucket load of trouble. I said it might even look like canvass when painted!Hi Sandy
When I build my Blacksmith toplights, I used milled L shape, and followed David Jenkinson's advice re profile moulded/ milled wooden roof sections from a chap in North Wales. The L shape came from Barry at Metalsmiths, IIRC, it's a while ago!
I covered the wooden section with cartidge paper to give a textured look to it. Can take a snap if it would help
atb
Simon