I haven't used any of my wrought iron yet, so i can't comment on it or damascus. My preferences come not only from what the customers seem to like, but also what is the easiest to work with for geting a good looking guard For me, the materials that do that are 416 stainless polished to the same grit finish as the blade or 1018 either etched, cold blued or both to get either a blue or "French gray" finish. I have some old fashioned rust bluing solution that I want to try on 1018 or wrought and I would also like to take a crack at browning some. From the knifemaker's persepctive, 416 and 1018 just cut, machine and file so much easier and more cleanly than 300 series or nickel silver.