Hi, Isaac; There are quite a few companies that do "Paintless Dent Removal". I have used them for door dings. Amazing what they can do. Check on line or yellow pages for the one nearest you.
In my 1988 GMC Sierra that I just purchased from someone else, it has two very large dents in it. One in the back, closer to the latch, and another one right by the gas tank that is heavily indented. If anyone has any insight besides plungering it, because they are far to large to be plungered out, I’d be open to any insight.