Finally the painter has sprayed some paint after 4 months.
The base colour is called storm titanium from Lotus. It's a medium metallic grey that gets a golden/titanium hew when the sun hits it. The first photo shows the effect of reflected sunlight hitting the bonnet. The second was inside the booth using a flash.
It should be finished early next week. I'll post some photos then everything is screwed back together.
Cheers
Al