Much obliged, FotoD—I had not really read too much about “high temperature“ salting, but it certainly seems worth trying.
Yes, the high temperature is mostly important for melting the gelatin. It'll stay liquid even if the temperature drops a bit during coating.
The gelatin can give a little extra depth to the print as the silver sits more on top of the paper.
The drawback is that if you salt both sides of the paper with gelatin it tends to fog more easily. Probably because it won't clear as well.