CAUTION: Always test any product in an inconspicuous place first. Always. DO NOT USE on wood, fabric, leather, mirrors, ...
By using a potato, you're getting oxalic acid straight from the source! Lemon And Salt Can Have Your Bathroom Shining Like ...
If level one and level two do not work, consider using a commercial rust remover like Bar Keepers Friend, an oxalic acid rust ...
[Chase] chose to make his rust by soaking steel wool in a solution of saltwater and peroxide and heating the resulting sludge. A small amount of ferric oxide is added to a solution of oxalic acid ...