Using your EBC S13 Kits with Yellowstuff Pads and RK Rotors is straightforward. First, make sure you don't install the upgrade pads on the rear if the front isn't upgraded too. When it comes to the Thermic Black coating on the rotors, just leave it be. It'll come off naturally as you drive and make your first 10 - 20 stops. Don't try to remove it with brake cleaner or other methods, or you'll void the EBC warranty. For maintenance, keep an eye on your brake pads' thickness regularly. If they seem too thin, it's time to replace them. Also, check the rotors for any signs of excessive wear or damage. With proper use and care, these brake kits will serve you well for a long time.