It depends on the state or area it is from. Some states use chemicals on there roads that increase corrison. The other thing is it would take a long time for the heavy metal parts to rust away due to the mass; like frame rails, suspension, and brake parts.
If they are an alloy, they will eventually rust.
How long will it t take a quarter to rust in fresh water
a long time
It depends on the quality of the nail. If it is painted it Amy take long to rust. In general it may take a month or so for the nail to rust.
a week it take or two
5 months
50 years
it washes it away and if you leave your skateboard outside the screws will rust and your grip tape will shed off
Phosphoric acid in cola can help remove rust due to its acidic properties. It weakens the iron oxide (rust) bond, making it easier to scrub away the rust from metal surfaces. However, using cola as a rust remover may not be as effective or efficient as dedicated rust removal products.
Brass is a corrosion-resistant alloy, so it does not rust like iron or steel. The key may develop a patina over time due to exposure to air and moisture, but this process is slow and would not be considered rust.
A very long time. Longer than you probably have.
It depends if the nail is galvanized (coated) or not. If it isn't, I doubt it because the alcohol is actually take away the rust, or at least cover it up.