1930 Model A Coupe The interior trim panels are attached with brad nails. They are driven directly through the face material on the finished panel.
There is a technique to do this without causing damage to the fabric on the panel.
First of all, each brad mail has to checked for a bur on the tiny head. A quick stroke with a file will remove the bur.
Second, Double check before you drive the brad nail straight into the wooden substructure. if you hit the metal casing the brad will bend and then you have a mess removing it.
Third, Use a regulator to make a small opening in the weave of the fabric and place the tip of the brad nail in the opening. This prevents cutting the material.
Fourth, Drive the brad nail until it dimples the surface of the pane fabric.
Fifth, Using a curved needle, pierce the fabric close to the head of the brad nail and pop the fabric over the head of the brad nail.
It is slow and tedious work, but this is how the panels were installed. After a while you will get very proficient at the process and think nothing of it.
I do suggest practicing your first panel install in a none obvious place until you get the feel for the process.
I cut my teeth on these interiors have done more than I care to remember. I you need further assistance , you can message me.