Why does ‘stainless’ steel stain, and what’s the best way to clean it?
Luckily, because the protection against rust and stains is built into the nature ... with low corrosion resistance, the ...
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How to Clean a Porcelain Sink
Its oxalic acid will lift stains, but be sure to use the product sparingly or risk discoloring and scratching your porcelain. Step 4: Lift metal stains with a little bit of acid or naval jelly.