Rustproofing is a way to protect metal things from getting rusty. Rust is like a bad cold for metal things – it happens when they get wet and stay wet for a long time. If metal things get rusty, they can stop working properly and even break. Rustproofing is like giving these metal things medicine to help them stay healthy.
To rustproof something, people usually use a special spray or paint that creates a barrier between the metal and the things that can make it rusty, like water and oxygen. It's like putting a jacket on a metal thing to keep it warm and dry.
Rustproofing is especially important for vehicles like cars and trucks, because they are often exposed to wet and salty conditions, like rain, snow, and salt from the roads. If a vehicle gets rusty, it can become unsafe to drive and even cost a lot of money to fix.
Many car manufacturers now rustproof their vehicles before they are sold, but some people still choose to add extra rustproofing to make sure their vehicle stays healthy for as long as possible.