think of a wound healing in the first place. Iodine works because it reopens the wound chemically and keeps it sterilized.
the way that i heard that makes sense to me is to keep it painted with Lugols and keep it air tight. what substance is best to wrap it with, i dont know, but some kind of plastic. it will get raw again and re-heal. how long it takes, i dont know. i would find some way to get some silver to the site as well, either internally or externally or both.