Interior door panel removal

Many door panels of all makes are held in place with plastic hardware muonted between the panel and the metal door frame. If you think you have found all the visible fasteners, try slipping you finger in between the panel and frame looking for a place where the panel is being snugly held in place.then try pulling the panel away from the frame. (There are also tools made for this but try doing it by hand the first time.) If it comes apart, do the same all around the panel except for the top. That may be different and require futher research.

I had a 1962 Falcon I rebuilt when I was in high school. What I remember is you have to remove the window crank and the door opener first. There is a special tool to use to pop the metal clips back. After you removed those two things use your tool to pop all the clips off. The tool is like a putty knife with a cut out in it.

I found that tool you need and am attaching a picture

You need a piece of wood, about 1/2 " thick and 2-1/2 inches wide. Slide it in from the side in the middle of the panel and turn. It will pop right off