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Stainless
Not much. The rod material used in the weld has a high iron content and the rust you''re seeing is simply that iron combusting in the presence of oxygen.
I would recommend Easy Dab as a wonderfully effective and very cheap stainless cleaner; it will take the oxidation off quickly with little rubbing and is often found in industrial supply stores. You might call National Chemical (1 800 NAT CHEM) and ask them if there''s a retail supplier near you.
Last time I bought some, it was $7/quart.
Jack
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