Just joined to post my pics to help the community solve the rust vs no-rust stain puzzle. Not a Yaris but the same problem. RAV4 owners might be less sensitive to issues like this but both the Ravs I've owned had this. In both cases it's at the lowest point of the boot. They have different boots with the lowest points in different places. First I thought something was spilt by the prev owner that caused the rust or the other way around - it started rusting and was treated with some m