Hi. Just after a bit of advice. Rear door on my 06 civic has a long patch of rust at the bottom end. It's staring to show on the outside but is fairly bad on the inside of the panel but confined to the bottom only from what I can see. I'm thinking of sanding down as much as possible and using filler and then sanding down again. Then some treatment of some type. It's a temporary car so not too fussed on looks etc but keen to repair as best as possible. Not sure if anything can be done on the outside. Appreciate any advice. Thanks!
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