Final answer:
The finest grade of steel wool used on wood finishes by restorers to remove bakes-on soot and the white discoloration caused by moisture is Grade 0000 steel wool.
Step-by-step explanation:
The finest grade of steel wool used on wood finishes by restorers to remove bakes-on soot and the white discoloration caused by moisture is Grade 0000 steel wool. Grade 0000 steel wool is very fine and has a high abrasiveness which makes it suitable for delicate tasks such as removing stains and bakes-on soot without damaging the wood surface.