All you have to do is to use waterproof paint.
zinc is used to prevent rust.
do tinning for wire to prevent rust do tinning for wire to prevent rust
Vegetable oil does not cause rust. It is slightly acidic, its similar to a lubricant and it can prevent rust.
Paint , grease , oil , nickle , electroplating etc.
Zinc is commonly used to coat iron to prevent rust.
yes
dont wet it
to prevent rust
by painting them at regular intervals
it doesn't
Nothing really, Rust happens there is several ways to prevent it. Rust around lug nuts is normal.
In order to prevent rust you need to coat it with chemicals, Some can be bought from the store but i find that there expenisive and don't work very well. You can also make you own using cheimiclas in your house. any kind of oil works well and anything with a high acid base