Sadly, the wheel manufacturers don't apply paint very well to these types of wheels. My camper, which I bought brand new, already had surface rust on the spare wheel when I brought it home. As I am sure you can guess, I painted it properly.
Not trying to pick an argument, but surface rust left alone becomes a deeper problem ( Cor Ten excluded ).
But then again, I am retired, and I love tinkering with stuff, so that's part of my reasoning for fixing stuff like this. What the heck, I have a seven year old truck that still looks new, because I waste way too much time washing and waxing :B
There is no rust on my Nissan, and if it gets any, it's going to the body shop ;)
YMMV. Your rust may vary too.