Removed the evaporator box.
Removed the rest of the ragtop (and it was literally in rags) and then removed the frame.
The rust is only slight surface rust. No metal is even close to being compromised. All the tack strip tabs are fine. I believe the ragtop was factory original. I'll blast this and coat with black epoxy primer from Southern Polyurethanes (SPI).
Removed all the guts out of the driver door. Dirty inside but no rust at all. Undercoating in good shape.