The photo shows the condition of my rotors with cooling holes occluded with a combination of brake dust and rust(?). My Performance Friction pads didn't show up in time for the rally, so I spent a chunk of my morning poking a screw driver through each of the 600+ holes and vacuuming up the debris. With fresh Textar pads on the back, and fresh brake fluid, I had no problems meeting the modest braking needs of the rally.