Make a solution of water and bleach, using one tablespoon of bleach per cup of water. Let the containers and other items soak in the solution for one or two hours. After the stains are gone, wash the containers thoroughly, rinse, and dry.Click to see full answer. Beside this, how do you remove calcium deposits from plastic buckets?Make a solution of water and bleach, using one tablespoon of bleach per cup of water. Let the containers and other items soak in the solution for one or two hours. After the stains are gone, wash the containers thoroughly, rinse, and dry.Additionally, how do you remove iron stains from a bucket? How to Remove Iron and Rust Stains On the tub, sink, ceramic tile, or toilet, wet a pumice bar, and rub the iron stain. A paste of borax and lemon juice also is effective on iron stains. Rub the paste into the stain and allow it to dry. Rinse with clear water, then repeat if necessary. Dry with a clean cloth. Hereof, how do you remove hard water stains from a bucket? You can also try removing hard water stains with a paste made from baking soda and vinegar. Smear the paste over the surface of the stain and let sit for 15 minutes. After the mixture has settled in scrub clean and rinse with water. How do you remove calcium deposits from metal? You can remove mineral deposits with these acidic household items and cleaners: Lemon juice. White vinegar. CLR cleaner. Phosphoric acid cleaners. Sulfuric acid. Muriatic acid (very strong- use only for tough deposits) Mix 1 part muriatic acid with 5 parts water.