Originally Posted by FPMartinez
I understand this treats the existing problem. My question is what to do to prevent it from occurring again? Apparently water or moister is getting trapped in the door. Do you know what to do about preventing this? This can’t be unique to the XF, is it? 
rust bullet guarantees it for 10 years once treated.
http://www.rustbullet.com/?source=ad...FSFWPgodeiV5UQ