Does cleaning an antique fire extinguisher hurt the value?

Cleaning an antique fire extinguisher can potentially hurt its value, especially if the cleaning process alters its original finish, patina, or markings. Collectors often prefer items in their original, untouched condition, as this can signify authenticity and history. However, if done carefully and with the right methods, it may enhance its appeal without significantly impacting value. It's best to consult with an expert in antique fire extinguishers before proceeding.