After finishing work, wipe the entire tool dry. Left wet, it will start to rust with rust. If this happens, you can try to wash it with a sponge and milk for cleaning the bathroom.
It is worth to wipe the blade with edible oil from time to time and then wipe it with a paper towel. The micro coating of fat will prevent rusty accretion.
-Nagar left after hardening, it’s a great anti-corrosion coating-