Stand a block of carving wax onto a wooden surface. Use a wax carving set to render a three-dimensional sculpture.
Cut a 10-inch piece of coat hanger and bend a hanging loop in one end. Heat the other end of the wire and insert it vertically up into the base of the wax figure, as a mold hanger. Fill a bowl or pitcher to the brim with water and insert the wax figure, inverted, into the water and catch the water runoff. Pour the water into a measuring container to determine the number of liquid ounces that it displaces. Pour the water into an expendable iron skillet and note the level to which the water rises.
Make a sand-dip bucket by cutting a 1-inch hole in the side of a 5-gallon bucket, 2 inches from its bottom. Insert the nozzle of an air compressor through the hole and let it lie on the inside bottom of the bucket. Place four inches of ceramic silica sand in the bottom of the bucket, covering the air compressor nozzle. Cover the bucket with a heavy rag.
Fill a small plastic bucket with liquid silicone adhesive. Dip the wax figurine into the adhesive and allow it to drip dry.
Turn on the air compressor. Pull back the rag covering the bucket and wait until the sand begins to swirl about in the upper part of the bucket.
Hold the wet wax sculpture inside the bucket and cover your hand with the rag. Swirl the wax piece around -- about two minutes -- until the liquid silicone adhesive is completely covered with the blowing sand. Remove the piece and hang it to dry for two hours. Repeat this process 20 times.
Place the wax piece supported upright in a heavy skillet so the wax can run out as it melts. Heat the piece in a 450-degree oven for 90 minutes and wait until all the dripping stops. Pour off and discard the wax and clean the skillet.
Place the iron skillet over a double stack of bricks in an outdoors location. Fill it with crushed aluminum beverage cans. Insert a lit acetylene torch under the skillet so that it reaches but does not touch the underside of the skillet. When the iron is glowing, remove the torch and insert it into the pile of cans and continue to heat and melt enough squashed aluminum beverage cans to reach the desired level in the iron skillet.
Place the ceramic mold inverted and within a circle of supported rags between standing bricks. Pour the molten aluminum into the mold. Allow it to cool for 24 hours. Use a hammer to break the ceramic mold covering the aluminum casting. Sand and polish the sculpture.