[FourthGenHatch]

You don't need to replace the whole panel. Most if not all rust will be found right at the bottom of the fender. And there is enough room there to cut that off then weld in a new piece. I saw on hondaautomotiveparts.com they make a very small section of the rear fender now I guess because rust there is so common, so you don't have to buy the whole huge panel.

And for $1100 a side I would rather get a new Civic than saved my rusty one.