You know the common yellow sponges with the green scratchy side? I tried using one to clean of the corrosion/gunk (whatever) off of the endcaps of my Saber. It scratched the shine away leaving a finish that looks more like brushed texture. I wouldn't think this would happen with nickel plating but it did. Is there a way to polish these back out? I would attach a picture but it wouldn't show anything more than a dulled finish.