I don’t know if that last bit can be removed, I think it might be damage do the existing paint/coat that created a bit of a scratch. I rubbed the hell out of it until my arm was shot, and that last bit really didn’t wanna come off. For what it’s worth, it stands out a lot more in that flash photo than it does when you actually look at it in person.
If I may, I would say WD has got to be head and shoulders better than compound in the abrasive department in that it is not abrasive at all, it is oil “and junk”.