I was wondering what the best process was for fixing rust issues?  

My experience has always been you had to cut out the effected area and then
use body filler to fix the area.

I have one spot (about 2 inches by 2 inches) right near by rear wheel area
on the driver's side that has had this rust area under the paint that has
slowly expanded.

I am considering cutting it out, but want to know the best way to repair.

Thanks!

- Mark
  
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