"pull hooks" are another option. Drill a series of 1/8" holes in the panel and insert a tempered steel hook with a T handle to pull back on while tapping around the area with a flat hammer. You can coax the metal back into its original shape with very little distortion, then weld up the holes with short pulses of a MIG welder. Grind/sand and skim coat with body filler to get the desired metal finish before priming and painting.

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Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!