Well my 03 has a couple small paint bubbles above the left rear wheel. Upon inspection, it appears something hit the lip underneath, and caused a separation between the outer quarter panel skin, and the inner tub, allowing moisture in there and causing some rot. I currently have the crust cut out, minus the lip, still need to drill the lip spot welds off, but i've cleaned and found all clean metal. Keep in mind the picture with the most rust showing is before I cleaned it all up, so don't worry, im not patching over that crust. I made the patch panel last thursday at work, and it is ready to cut to size and weld in. Also, the passenger side sail panel above the door had a crack, so it is also off the car and going to get repaired and repainted.