I did it by using lots of polish, time, and a little (drops of) water. I don't remember holding my boots under a faucet, maybe I could have had an easier time if I'd have known back then. Some folks did use heat guns, but that always made the polish crack for me.
After you’ve water-bulled with the little drops of water how did you get the water off without leaving any streaks? This laminar flow approach collects them up and rolls them off as larger drops so the surface is left dry.