I did not bother to sand off the first side of the sculpture as I shall no doubt mess it up to some extent whilst shaping the second side. As you can see I turned the piece over on the ground with the Matbro, lifting one side and extending the boom to allow it to lower onto the face that is not yet worked. The other side is generally cleaner with only one area which might cause concern. A crack tapers out but all the while descending into the marble. We shall see how that plays out.