So I have an unmachined Deep V on my front wheel. Today I had to slam on my front brake in order to save my life. Unfortunately, this left a big black ring around my wheel. I have tried rubbing it off with soap and water, but that didn't seem to work. I also tried simple green, but failed. Does anyone have any tricks to get this black ring off, or is my wheel branded for life and a constant reminder of how if i didn't have that brake i would be dead.