It may come as a surprise but our modern day internet doesn't have much information about how to defrost a 70-some-odd-year old fridge. There are no webpages, blogs, or DIY YouTube videos dedicated to the subject. Apparently that’s not something people have to deal with much these days.
To my surprise, it did work. The steam and heat loosened up the bricks of ice clinging to the freezer panels. It didn't come off as easy as I hoped but with a little extra love they broke free. The process took roughly 20 minutes. I did, however, have to reheat the water pot 3 times to keep it nice and toasty. If I’m a bit more vigilant about how long I go between defrosting this will be, as they say, “easy as a cake walk.”