Hence the weakness and the dark-grey fracture of this iron, and hence, by brushing this fracture with a wire brush and so detaching these loosely clinging flakes of graphite, the colour can be changed nearly to the very light-grey of pure iron.
degrease the part and use a stiff wire brush to remove any surface dirt.
Use a soft brass wire brush and buff the body casting to remove discoloration.
Some light pressure with a wire brush removed what tiny flecks of rust remained.
The best utensils for cleaning a barbecue are a wire brush or crumpled tin foil.