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For mine tub, I used phosphoric acid to remove the rust, then reaplied enamelent laquer. I had partialy rotten ring around the main drain in the tub, but with some silicone gui I sealed it off.

Expect to be temp solution, worth 1-2 years.

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17y ago

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To address rust under a bathtub, you can start by removing the rust using a rust remover or a solution of vinegar and baking soda. After removing the rust, apply a rust-inhibiting primer and paint to prevent further rusting. Consider having a professional inspect and address any underlying issues that may have caused the rust.

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10mo ago
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Q: What can you do about rust under your bathtub?
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