Thanks for that Lazy8, sorry for the delay replying, but I’ve been a bit under the weather for the past few days.

That’s a very good point about the opacity of the finish.

I think it’s even more comprehensively demonstrated in this picture

Bristol F2B… by Richard Hards, on Flickr

The sun appears to be almost directly overhead, yet there is absolutely no sign of any sunlight though the wings.

Thanks again
Richard