I've heard the plastidip is really resistant to stone chips and damage, if done right. I did a grille with it on my last car, and was brilliant, I don't think it chips as easily because its quite soft.
My front lip is plastidip, plenty stones hit my car lol, been on my car for over a year and no damage etc. still holding strong! I can imagen using it on RS alloys would be hard to take it off cus of the shape
Then finished with Silver Metalizer for a Gun Metal look:
PlastiDip is very resilient to marks, stone chips etc... the people that claim otherwise have either never used it, or have applied it incorrectly. I have had my front fogs and grille's PlastiDip'd for about a year now and they show no signs of chips, lifting, peeling etc...