Diamond cut reps wont even last a winter.
I bought what were supposed to be the best replica RS8's for my Leon 10 years ago. They looked stunning and seemed really good at first, but as soon as the salt got to them, they were shot on no time, dispite being sealed then cleaned at least twice a week.
If you think white worm on the originals is bad, it's nothing to how bad reps will get in a very short time.