I had the bathtub reglazing I was considering, completed last week (see previous post).
The tub does look better but it’s not perfect because reglazing in-place is an imperfect process.
There is no foolproof way to make the room a ‘clean room’ or fully sanitize the installer, although in retrospect they could have done more shielding around the work area. Since the replacement glaze is installed like airbrushed make-up once the tub is prepped, any bit of dust in the air races directly to the newly finished surface, resulting in minor imperfections. (Most of these were subsequently removed by my installer with a small razor blade.)
In addition, reglazing cannot completely hide surface damage from overzealous cleaning, since fixtures aren’t stripped to bare metal. (Darn those overzealous cleaners!)
The new finish shine is guaranteed 5 years and should last longer with the right care. Fingers crossed.