again, how big are the "dings" and do you wanna get into repainting or are you hopin to just get them out?

if repaint isnt a problem, feather sand about 1" around the center of the ding, fill it with body filler, sand it down til its smooth, wet sand etc... then paint and it will never be noticed

if they are pretty big try a dent puller, you can get them for like 3 bucks at pep boys - its just a suction cup