You're not going to always know right off the bat if a panel is high strength steel or not untill you start the repair. Even once in awhile Mobile Tech Rx isn't always updated. This dent took a bit to get it to move.
Using the latest https://www.kecotabs.com "Dead Center Tabs" I show bits of clips how it was done.
Along with the No Roll tap down from https://www.edgytools.com and https://www.willeyquicktools.com
Check out the full video on http://www.denttrainer.com