The attached chair (2) were given to me and I am going to cover in a canvas material (twill) one in lime green and the other in natural as per picture. Now I have cut out the material and want to do a binding around the outside. I have the cord, can I just use a straight piece of material to cover the cord to use as a binding (hope that is the correct phrase)? Why does it have to be cut on the bias? The cushion is like a figure 8 with the top being bigger and I am sure the binding will go around the corners as they are not small. In other words I have no idea what I am doing to think that the binding will make it look more professional!! (Please note: the picture makes the cushion look good, it is stained and the other is dark green and I wish to change the colour).