Originally Posted by
oneclick
You just might be able to do it if you spot-welded something to the centre of a dent - but of course the bother and the poor chance of a good result make that theoretical.
Not theoretical at all. That's how the professional body shops do it. Spotweld a stud to the dent, and then use a dent puller to pull up on the dent while hammering around the edges of the dent.