Real World PDR's Jim Mitchell offers this quick Real Time PDR Lesson. Here we look at panel edge dents, how to fix them quickly and easily using the "EDGY HOOKERS." These PDR Tools are worth their weight in gold in the right situations.
https://www.RealWorldPDR.com has hundreds of video lesson just like this. Spanning from 5 minutes to over an hour long. From absolute beginner to seasoned veteran, there's something on https://www.realworldpdr.com that you can learn.
If you're interested in the EDGY TOOLS Pull Rite Hookers.
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These aren't PDR Tools that you'll use every day. but they will pay for themselves the first time you use them.