Car magnets doesn't cause rust.
Rain and oxygen cause rust to form on metal surfaces. this is called oxidation
remove any rust, buy a good quality rust prevention products eastwood.com has some good ones, apply a liberal amount where water can seep in and cause rust.
It can cause rust;Gas gauge malfunctions, and even mess with your cars computer. Not good.
Yes, Over time the salt in the water will cause the vehicle to rust.
Yes, as a car gets older its compression ratio will change. This is because the rings within the car will gradually age and rust.
rain
Not a good idea, you'll cause rust wherever there is exposed metal. It should be wiped down with tack rags instead.
It is very corrosive and will cause any metal it comes in contact with to rust.
Something that is rust resistant will not rust easily; minor exposure to water will not cause it to rust. Something that is rust proof will not rust.
Yes , when its full of tank dirt and rust , some can pass and get to ur fuel injectors and cause it to miss or in some cases stall
it just pulls right off. It may take a little effort since rust due to the age of the car.