Dang it, Tony Aztec Bronze is my favorite color.
The rear window rust is going to be far worse than what is seen and will include the lower sail panel. Paint could still could be blended in at the sail peak and down to the trunk lid.
I tried to get my '66 painted that color a couple years ago, but it's a difficult color to get done correctly. Paint is bc/cc and is not correct, but pretty darn nice.
Here's mine right after paint.
Paint is like a chameleon with different light.