Here’s a dent I did with one of my really good technicians Eugene Baek. This dent was way stretched than we anticipated. The metal was very soft and hard to manage. One of the key things was to use a knock down that was not too sharp. Basically use a soft tip knock down or a cherry rubber tip to remove the crowns without putting tap down pits.
There was a lot of trapped pressure too and with the sheet metal being so soft, it would not cooperate very much. You really have to look for hidden crowns way on the outside of the dent. This is where it’s locked. If you don’t know where to look, you’ll have the utmost hardest time getting rid of the dent.
Anyhow, this is how it turned out. Not 100% but pretty close.