Has anyone actually propagated lichens from a buttermilk mixture? Do you have a recipe and does it work? I have been on the internet, but there is a lot of differing advice, from a dilute spray to just painting a straight blender-made concoction of buttermilk and lichen on a surface. A number of people say they have heard it works, but have not done it themselves. Any help you could give me would be greatly appreciated. Diana Fish, Carmel-by-the-Sea, Zone 9