After much faffing about and general deliberating I narrowed the wheel colours down to a few options

VW Polarsilber Met (LA7V)

Porsche Paladio Met (555)

And Porsche Linen Met (LM1U)

I have chosen Porsche Linen, I think it works the best and it is period correct for the alloys

I should have them repaired and the insides painted on Friday!
What do you guys think?