Agreed!The paintless dent removal guy is the way to go. Don't do it yourself- you will F*#K it up and regret it later. These guys do this everyday. I have used paintless dent removal guys many times and they are well worth the few bucks that they charge for their service.
I to have found this to happen also you park far away and come back out and there are cars all around yours. I call it the car magnet effect. The only remedy for this is to take to spots by parking at a angle in the north forty that way they can't get you or your doors and if there is a curb or corner near by use that as a blocker also...Yep this is why i DO not go to wall mart..EVER...Still have a rear passinger door ding at the fenderwell.. and yes i was parked in the north forty... went in with noone around me came out and like 20 cars parked around me..But the one that did it must have known and left after the fact ,and someone else was there ..differant paint.