Nasty RUST!!!

YlwMSP

Member
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2003.5 Mazdaspeed Protege
The bottoms of all 4 of my doors are rusting (inside below weather strip). The passenger side doors are starting to rust bad enough that it is starting to wrap around the bottom of the door and is visible from the outside. Also the clip that holds the rear bumper on is starting to rust on the driver's side and has completely rusted off from the passenger side and causes it to rattle when driving. Does anybody know of an inexpensive solution to help stop the rust from spreading, at least for a little while? I'm thinking of cutting out the bumper clip areas and attempting to bondo it, but for the bottoms of the doors, I'm lost.

Any help would be appreciated, thanks
 
I'll try getting some pictures up tomorrow when it's light out to show exactly what I'm talking about
 
I tryed to fix this same problem spent many hours sanding the bottem of my doors and primed them but a few months later the rust came back
 
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