The Small Comforts are out of the kiln!
I wound up pouring clear glaze inside, as a liner, and spraying the aqua glaze on the outside. The lid of the tin can teapot also had a little piece of glass (the kind you get at the dollar store for the bottoms of aquariums) left on top of the knob. That’s the crackly blue stuff. I was expecting it to bubble over and pool around the base of the knob, but some serious surface tension kept it contained.
As I don’t have a lot of experience with spraying, and didn’t quite get the glaze even, there are some almost-bare spots around some of the nooks and crannies in the handles. I’m thinking of reglazing those areas (and maybe adding some drippy bits going from the rims down the sides of each pot while I’m at it). Otherwise, though, I’m pleased as punch.