Rust on wheel Nut casing

[Tyre Man]

Hi, I have a 07 Jetta SE and have noticed a rust build up the wheel Nut casing (not sure if that is exactly what it is called), which can be seen clearly when you look through the Atlanta Alloys. Has anyone else had this occur and did you perhaps find a solution with either VW or else where. I have been advised it is not a problem, however it does not look all that great close up
Thanks.

[STEWY L]

every car is the same. some people paint them,as they do the calipers, but having painted them, you need to keep on top of them,otherwise they look worse than the rust!!!

[Tyre Man]

Thanks Stewy L.