With heavy use and washing, however, graters can lose their protective outer coating and develop rust spots. Rust on a grater is dangerous and rubs off onto food items. Rinse the grater, and dry it thoroughly with a hand towel. Wash the kitchen grater by hand when it gets dirty.Click to see full answer. Simply so, can you use rusted utensils?Rust forms on the surface of iron and is soft, porous and crumbly. Rust is not a food safe material so it should not be ingested. If you see rust on the surface of a utensil such as a cast-iron skillet or knife, remove all the rust before using it.Subsequently, question is, is Rust dangerous to touch? Rust doesn’t cause tetanus, but stepping on a nail might if you’re not immunized. In fact, any damage to the skin, even burns and blisters, allows tetanus-causing bacteria to enter the body. Tetanus is not as common as it once was. Regarding this, is Rust toxic to humans? Consuming rust in small quantities is not poisonous but can be beneficial to people who are deficient in dietary iron. Again in small quantities but just as drinking too much water can be fatal, to much iron content can be extremely unhealthy. “Acute iron poisoning happens when people overdose on iron supplements.Does WD 40 Remove rust?WD-40 to Remove Rust. While WD-40 isn’t only used for removing rust, it’s considered a cleaning product that can be used in this capacity as well. The reason it works is due to WD-40’s ability to cut through and dissolve the rust, restoring the surface to bare metal.