Yes please post some pictures if you can. Mine has one funny "mark" on it from something (don't know where it came from it's mostly garaged) but i dont think I noticed any fading. I'll take a closer look at mine.
What about the following product
Meguiars g15308 all metal polish
I only posted what the manufacturer stated,I cannot comment outside of what they recommend, you are free to try, but you risk voiding any warranty claim by doing so.If you are really concerned take the vehicle to the dealer and have them document and repair, that will acknowledge your issue should it happen in the future.