[n20ta2]

I will usually work a shallow ding with a hammer and dolly from the back of the panel if I can see it or acess from the trunk or inside the door ect. If it's shallow and can't be worked with out pulling I usually won't bother if its only going to require a credit card thickness or less. I skim the whole panel with filler and then sand 80% of it off anyhow so most of that is covered. Of course a small straight edge will tell you if the sheet metal is high around the ding as that will need work because you don't want to fill the panel to match that.