I got my Italian floor corker today and put it together. I tried it on an empty bottle to make sure the depth was good and it was right on. I looks at the jaws and they did not look like brass. They are metal but they are silver not the gold look of brass. Also they were covered in oil. I am assuming I need to clean all the oil from the clamping jaws before I use for real. Should I be concerned about the jaws not appearing to be brass? Thanks.