Now Alex is going to prepare the filler that he has applied for a traditional polyester body filler. The metal to metal filler that he has used the gray filler does not stick as well to a painted surface of to old body filler. It is harder to shape and it smells bad when you are working it. Notice that Alex has on a respirator again, you want to make really sure that you don't breath anything you are sanding. Right now he is trying to get the shape of things basically right. He is also trying to rough everything up so that the next layer of fillers sticks on it, inhere to the car well.