After a short delay which I won't go into, I have spent the last couple of days cutting and fixing the topside cabin cladding.
Now I've done this I will be ordering the window trims.
I think I have finally found the product to finish coat the ply as I have seen on other boats. I have a test pot which I am going to have a ply with soon. Seems its not a paint, its a pigmented lacquer. I will post the results. My experiments with various paints has been a bit disappointing.