Pretty much everyone here affected..
I bought some "Very High Temperature" paint from HalFRAUDS.
Remove all discs, a good rub down, used a dremel for the tricky bits, a quick paint up and all lookin' lovely..
My suggestion is do it yourself, if you ask a dealer to do it they may only do a quickie job where as you'll take your time if it's your pride and joy.
It's the disc flanges that aren't coated, some manufacturers do some don't, it's not a fault, just a cost cutting exercise.
Some here have managed to get dealers to fix under warranty, I reckon it's not worth gettin out of your pram over it as it certainly isn't a fault.
Another quick tip, when you replace the wheels, smear a dollop of copper grease onto the face of the hub, this will limit the corrosion being caused by the two metals reacting & it will ensure your wheels come off easy at the next service
Some owners just don't care about the rust, each to their own but when you own a gleaming white LEON the rust around the discs stands out and looks gash.