Years ago - when there were people who had and had used, at some time in their life, a: Po, Guzzunder, Gerry etc, I heard a person relate that an old wives tale had them put their feet in the urine as a cure for chilblanes. And the woman said she didn't like doing it. The efficacy was not stated.
But as a preventative treatment - would you allow yourself to get chilblanes? Knowing that in the morning .................