Ended up changing the colour scheme slightly in the end.
Went with carbon fiber, brushed aluminum and gold look.
This was an absolute nightmare to texture, but since I have so little time I need to keep moving. Might add a few more accents, but then export the files and do the final pose. Starting to wish I had made a more simple character, but I am happy I pushed with this.
Here are some super drafty previews from the substance painter preview window: