I doubt it on the dung.
Vietnamese boats use a pitch or resinous goo.
Far as I know the Vietnamese are the only ones to have made extensive use of woven hulls, at least within historical times. The Japanese have a similar tradition but not quite the same and of course in the UK there are currachs and coracles. But the woven bamboo is unique. This is more like cement than anything else. Corey's got one of those basket weave hulls up at his place.