Clear shouldn't from normal use. Mine have been installed over a year ago now and I put over 50K km/yr and they show no signs of wear I smoke and drink coffee, etc in the car when on the road, so the interior gets alot of wear and tear and still nothing.
If by some chance it does wear or need to be "repaired", it's just a quick sand and re-spray, but I really don't expect much of any of that to be happening....
BBS LM wheels
//M sport package
BMW Personal Audio System
++More to come this winter