How would you repair this?

I wish I knew, but it didnt take much of a tap for it to warp like that. At about half way bent up is when I noticed it had it start to dimple. Just ever so slightly, The more I tapped it the worse it got.. Figured at that point the damage has been started and I need to get it bent the rest of the way so I just continued. I know it looks like hell and Im irritated it did that, but Im glad I have extra paint from when I sprayed the car... Besides there are some more rust bubbles forming behind the rear wheel that I want to take care of so I guess its ok.