This is my #1 favorite sculpting medium! It is one of the only epoxies that will smooth out with water. Its grain structure is finer than any other product available. It won't shrink or crack even when formed in large structures. It can be shaped by hand or with modeling tools. When it hardens it can be sanded, carved, painted; you can attack it with a grinding tool and the cured material will not break apart or lose its shape. Magic Sculp will cure at room temperature!