These are iii of the best, best multi-use hypertufa recipes or mixes I have found. They are excellent for original tough grind and can be adjusted for casting and use in molds. One is form of special; it is a good mix if you poverty to try carving your hypertufa after you have classify a seamed outline.
Carving is variety of fun, but as well requires a just magnitude of patience. I hypothesis that is why it never caught on beside me. I can by a hair's breadth pause to de0mold my castings, ne'er nous have to trade on them after I get them out of the mold.