I've got an old (and very heavy!) RR Beard rotary glazer that I routinely use for FB prints. I'd say about 60% of my FB prints are glazed, the remainder either being FB glossy paper that is dried with the emulsion side against the canvas for an "air dried" sort of finish, or non-glossy paper dried likewise. For most prints (not all), I love the glazed (ie ferrotyped) finish........quite different to RC gloss. Whilst I do have a good supply of ancient Johnson's glazing solution (lasts for ages as it's used very dilute), I find it's not really necessary. What is important, though, is testing by trial and error to get the temperature setting just right. My optimal setting gives the print two circuits of the drum, and on the second circuit, a fully-glazed and dried print pops off the drum; they come off reasonably flat, but overnight under some heavy books gives a flat print with little effort. Clearly, all the points regarding cleanliness etc must be borne in mind, but I wouldn't be without my drier when it comes to FB printing. .......both for quality of results and speed of drying.