On 24 Mar 2010 03:54:43 GMT, "Lisa BB."
wrote:

My husband has a gizmo that looks like a giant thimble. Inside are
wire brushes. The thimble goes on top of the terminal and all you have to
do is spin it around while the brushes do the work.

Yeah, that's called a battery post brush. It usually or often comes
with a battery terminal brush (which is sort of the opposite of what
you describe) as part of it, but not always.

It's also good if you are a giant and need to do some sewing.