spoke to the guy at Reinventing The Wheel, Tewkesbury who are carrying out my wheel refurbishment for Lexus next week.
I asked him the best way protect the finish. His answer was that you can't and that as soon as you drive away on them they are likely to quickly have issues. He said the best thing to do would be to have them powder coated and that he could replicate any Lexus wheel finish. He suggested that perhaps a shadow chrome might look nice and that if I could call in he could sow me some colours. I spoke to the Dealer booking department today and said that I wanted this done. I know it will be cheaper for Lexus so I've got to now decide whether to have a silver finish or perhaps go for a shadow chrome