Not at all. I was just in the garage tinkering around and admired how "polished" they look - like a mirror - and the car has been siting idle for about a month. My 911 has PCCBs and I'd say the GiroDisc look even better. Very happy I made this upgrade. They do dust, but no where near the amount that the OEM rotors do. They also do not oxidize very much after a wash. I paired them with EBC Red Stuff which also dust very little. Great performance combination for the street.Random question: Do these giro disc rotors rust up quickly like the stock rotors do when washing the vehicle?