Reassembly has begun!!
While all of the screws, metal posts and guides were in the tumbler, i decided to repaint the top arch, as it had rust starting to form under the existing paint.
I stripped it back to bare metal then hit it with some primer/filler. After that had dried and had been wet sanded with 400 wet/dry, i wiped it down with Prepsol and cloth then sprayed with some yellow acrylic.
The paint used was Power Plus spray acrylic, i think the colour was called Vivid Yellow and was a pretty close match the original colour.