Took a break from stripping paint and tackled this dent on my Willys bumper.
Can see the distortion in the reflection and also the damage on the underside.
I just did it this way. Using a soft mallet on the stump so both had some give and wouldn't stretch the metal.
With most lifted it was on to more detailed work. Used a matching curved dolly and a flat faced hammer on top. I had the bumper sandwiched between the base boards of my house at one end and jammed into my stomach at the other while the middle rested on the stump. This was so I could push up hard from underneath with the dolly while tapping around the outside of the dent with the hammer from above. Pushing up harder than you are tapping down off dolly will raise the centre.
The metal is way too thick to use my bullseye pick hammer, but I used it to mark exactly underneath where I had a tiny amount of a crease left on top.
Then I line up the marks from the bullseye pick over the crack in the stump and then hit down, with the new hammer I bought while over in England recently, to hit on the marks.
Can see it has come up pretty well and have done no filing. Just light hand sand to show up any low spots.
Still got to get a little bit more on the side which I will do over a piece clamped in a vice to lift it.