Great topic and well explained I've only used Arko so far. It works well using this info. One other pointer I got was to not only rub the stick on your face, but also on your brush and lather. It may need a little extra water. But you have a lot of soap loaded in your brush. You use a bit more product. But Arko isn't all that expensive and I seem to get a little better tallow post shave feel out of it.
