Dave, are you allergic to a component of Germolene?, also not a sensible thing to use for sunburn of the face. Perhaps the sunburn took the skin off your face? You could have used Goose fat or butter or some other old wives/quacks tale of treatment to the same effect...skin coming off etc.
Or be like me and just consume enough anti-oxidants not to need sunburn at all. But I think we've talked about that in a thread ages ago already.
, for the cost of a tube of Germolene/Savlon/alcohol gel/soap and water, put all the seaweed, peeing on cuts et al on the back boiler so to speak for crying out loud. There really is no need to faff about peeing on yourself etc or knocking up some Old Mother Hubbard's Herbal stuff...keep all this 'ye olde knowledge' for the end of world days etc when you can't buy stuff that actually works.