How to remove various stains. The one hint not mentioned with stubborn stains is to expose it to full sun for several hours. Stains are (usually) some how lifted during that process - but does not work on oil stains.
Rust is caused by a chemical reaction between iron and oxygen. Updated February 19, 2015. Over time, iron develops a red, flaky coating called rust. This is an example of an oxidation reaction. Other everyday examples include formation of verdigris on copper and tarnishing of silver.Here is the chemical equation for the rusting of iron:Fe + O2 + H2O → Fe2O3. XH2O
I need to try this--How I got rid of my mold/mildew stains in the caulk WITHOUT scrubbing. Took a container and filled it with bleach, soaked cotton balls in the bleach and set them around the tub line. Removed and rinsed a few hours later... my shower looks brand new!