roof panel replacment

Hey 340. I had the same thing, looked like an a$$ cheek sat on the roof. what I done was heated the panel from the inside then popped it with my rubber hammer. just need to make sure NOT to heat to much. When I put heat to it I could watch the panel start to move on its own but would not pop. at that point is when i hit with hammer. It took a few times to get it out but they are out.
Just my .02 here but I would rather try fix the dent then cut a hole for the sunroof first ( i would just hate cutting all those spot welds out). Then if i could not pop the dent out I would THINK about replacing the roof panel.