This might seem like an easy fix but it's been fighting me so far. I'm relatively new at sheetmetal work so go easy. haha I have about five dents in the upper crown/edge of my firewall. They are deep and only about as round as a nickel. I tried to use a stud gun on them to pull them out but their not budging. I assume because the strength of the metal in the curve. I was going to try hammer n dolly them but it is a sharp curve on the back side which non of my dollies will fit in. The cab and firewall are welded to the frame because of the cage so I can't just remove the firewall. My thought was to go buy one of the dollies that is as round as a quarter and see if that will fit up in there or? My wise ass friends said to just mud over them but that would be too easy. Any thoughts?