Like QueenCityAler said, if it has any scratches in it, then use it to clean your immersion chiller or to soak items, but it's life as a fermenter is over. In other words, if it has been used to store anything other than wort, then use it for something else. My buckets are going on 3 years without issue, but nothing touches the inside except wort, cleaning solutions, star san, and brand new non abrasive sponges.
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