I've just fitted some new Alloygators rim protectors to the nearside wheels of my S3 - i.e. the ones that can get kerbed by my wife when parking! I've been using them for about a year, during which time they've saved me several wheel refurbs.
I fitted silver ones this time, which look slightly less obvious to my eye than the black ones fitted previously. Good fitting is key, as I found out when fitting my first set - one of them worked its way off the rim after a few weeks.
Here's a new silver one fitted:
With black ones fitted for comparison: