How can you tell if metal is galvanized?

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  1. #matter
  2. #galvanized
  3. #steel
  4. #gauge
  5. #coating
  6. #there
  7. #testing
  8. #determine
  9. #paint
  10. #would
  11. #laboratory
  12. #thickness
  13. #using
  14. #magnet