Is this acid etching?

No, I do not do acid etching. This is sand blasting, with silicon carbide  180 grit size.

 What is glue chipping?

Glue chipping is a great texture you can create on the surface of a piece of glass. It is called "glue chipped glass" because the surface of the glass is chipped by the controlled action of a particular type of glue. The texture looks like ice crystals on glass in winter and is used as a striking decorative effect as well as to block the view through a piece of glass without blocking out light. You can create it over the whole surface or in selected areas as part of a design. It looks great in combination with etching.

 What is surface etching?

Surface etching is when there is only one stage in the etching process, and the glass is etched evenly.