Panels are stiffer at their edges, around braces and along body lines. A dent there needs more careful work, and sometimes glue-pulling because rods cannot reach.
Learn to feel where the bracing is as you read the panel. It tells you which tool and which angle to use before you start.
Quote edge dents with care, because they often take longer than their size suggests.
Go deeper: this idea comes from the PDR eBook. See what is inside the eBook.
Prefer hands-on learning? See training dates. More PDR tips.