Sorry for the lack of updates, finally got somewhere and it's nearly out of the paint shop and ready for the buildup.
Colour is a Jaguar one, not as dark as it looks in the picture!
Some questions for you experienced builders:
-What have you used as a pretend windscreen surround chrome rubber trim
-What have you used for the roof gutter/side window surround trim
-If we need to fit Z4 narrower-track hubs with the wheels we've decided to go for, what part numbers do I need and what needs to be replaced? The car was a widebody.
-Which gas struts do we need for the bonnet?