Ok, so what happens after the pieces are cast and removed from the investment and cut off their sprues? Its tooling time! Step one, use the roughest disc on the flexshaft to grind off the knobs where the sprues attached to the piece, and remove any other gobs of metal that are out of place. Then, using a series of lighter and lighter grits of polishing wheels, buff that baby up until she shines. Enjoy!
