1. **Lime-A-Way**: This product is specifically designed to tackle hard water stains, lime, calcium, and rust. Its active ingredients dissolve rust stains effectively.
2. **CLR (Calcium, Lime, and Rust Remover)**: CLR is a powerful cleaner that targets rust, calcium, and lime deposits. It is safe for use on porcelain and ceramic surfaces, making it ideal for toilets.
3. **Bar Keepers Friend**: This powder cleanser contains oxalic acid, which is effective in removing rust stains. It can be used on a variety of surfaces, including porcelain.
4. **Iron OUT**: This product is formulated to remove rust stains from toilets and other surfaces. It is a non-abrasive cleaner that works well on porcelain.
5. **Zep Acidic Toilet Bowl Cleaner**: This cleaner contains hydrochloric acid, which is effective in removing tough rust stains. It is designed for use in toilets and other bathroom fixtures.
6. **Pumice Stone**: A pumice stone can be used to gently scrub away rust stains without scratching the porcelain surface. It is a manual method that requires some effort but is effective.
7. **Vinegar and Baking Soda**: A natural solution, vinegar and baking soda can be used to remove rust stains. Pour vinegar into the toilet bowl, let it sit, then scrub with baking soda.
8. **Coca-Cola**: The phosphoric acid in Coca-Cola can help dissolve rust stains. Pour it into the toilet bowl, let it sit, and then scrub.
9. **WD-40**: Although primarily a lubricant, WD-40 can be used to remove rust stains. Spray it on the stains, let it sit, and then scrub.
10. **Hydrogen Peroxide and Cream of Tartar**: Mix these to form a paste, apply to the rust stains, let it sit, and then scrub.