Now that we have the petals cut in, its time to clean up the edges of the disk and to finish shaping the petals. For this you will need your Angle Grinder with the Grinding and Cutting disk. Be sure that the cuts are straight and all the way though the Petals. Run the grinder over the surface of the Petal Disk repeatedly until it is smooth or shiny. Once the disk is smooth, round the sharp corners of the petals. This will make it safer and give it a more realistic petal look. Don't rush yourself on this step. Depending on how well you smooth the petals and round the corners will determine the look of the final product.