So I just found a rust spot about 3 inches wide, and 7 inches long in my driver side rear wheel well. Is there a quick fix? Or what should I do? Part has rusted all the way through, like a hole you can see through about the size of a quarter. Any suggestions would be great!

 

Jon,
It all depends on how you want it repaired. Chances are if its all the way through the panel, you will probably have problems in other areas as well. Best thing to do to start would be to get the car up on a lift and look for any other areas that might be rusty as well. Depending on the severity and how much you love the car, you might want to look at either dumping this one for one in better shape or see if you can find a knowledgeable body shop that does panel repair or replacement.
Steve