Put the Tomato Paste on the rusted metal surface
Clean the surface with cloth!
由於金屬生鏽是鐵氧化的現象，而番茄醬內含有鐵離子，
因此就可運用其化學氧化還原的原理，讓鐵銹清除掉了。
As the metal rust is the iron oxidation phenomenon, and tomato sauce containing iron ions,
So you can use the principle of chemical oxidation and reduction, so the rust was removed.
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