i've used a steel wire brush on the polishing lathe or flex shaft
for some time now happliy and successfully. recently however it
seems to be turning the metal black, and persistenly black at that!
any suggestions?... jane
Jane, I often use brass bristle brushes on the flex shaft but
occasionally use steel as well. In both cases I sometimes get a black
coloration and I believe it happens when I allow the brush to "drag"
on the metal; in other words, when I hold the brush in the same place
too long. As long as I maintain a light touch and keep my hand
moving, I’m OK. Hope this helps.