Guess it's not all that common? ;-)

And that makes me just a little bit nervous!

By "dusted" he might mean 'lightly sanded.' I don't know much about any sort of glaze work, but this seems plausible to me.

I normally brush or wipe on glaze. This allows me to manipulate it to my liking. A year ago, a Mohawk salesman demonstrated an aerosol glaze for me. I was not too impressed with it, so I never followed up. (seemed like an answer for a question that no one asked.) I would not exactly have called it "dry" and it was meant for touch up work.

Maybe these things are local?

Apparently Plain & Fancy uses this same glaze method. I believe it is wiped on and then brushed off as it drys rather quickly. Is it difficult or complicated to work with the traditional glaze?

Glazing is not hard to do. I use both oil- and water-based, depending upon what finishes I'm using. Most have a good open time, so you can manipulate the finish to your liking and if you don't like it, wipe it off and start over, add another color, etc.