Hi E,
Are you saying that, even though it was ground down to the silver finish it still needs additional brushing with a steel brush? ( I will say a few days passed between the grinding down and the black oxide process). But the metal looked shiney silver and rusted immediately when I put the BO on.
The surface appeared rust free before I put the BO on it. If I don't see the rust how do I know when I have removed the rust?
I am very new at this - thanks
dj