Using your EBC S2 Kits with Greenstuff Pads and USR Rotors is straightforward. First, make sure to follow the rule of not fitting upgrade pads to the rear unless the front has the same upgrade. When installing, don't worry about removing the Thermic Black coating on the rotors; it's there to protect against rust. Just mount the pads and rotors as per the standard brake installation process. After installation, take your vehicle for a short drive and make 10 to 20 stops. This will naturally remove the coating in the area where the pads sweep. As for maintenance, regularly check your brake pads for wear. If you notice excessive wear or reduced braking performance, it might be time to replace the pads. Also, keep the rotors clean and free from debris. Avoid using harsh chemicals on the rotors, especially anything that could damage the remaining Thermic Black coating. With proper use and maintenance, your EBC S2 Kits will provide reliable braking for a long time.