We had very little time for the complete project and based on some Youtube videos Shellac looked promising as it dried fast and was easy to work with.
On selecting the product we wanted an Amber tint to the guitar and that was only available as waxed. I believe their clear shellac comes as waxed or de-waxed.
So we didn't have a de-waxed option, but also we didn't know the pros/cons of each either at that time.