well its just developed only on hte passenger side for some reason. maybe i can explain it like this... look at the pictures and look at the wheel well just behind the door thats where its develping on my car but i have a 2door. its on the inside you can see if just by standing there and looking, you have to bend over and look inside the wheel well to find it. there just little balls of rust but i wanna get them taken care of with maybe a solvent or chemical without havin to cut up my car and sanding the hell out of here. i washed my car regularly at a splash and dash laser wash.