I'm debating on picking up the Giant Cypress ST soon. I know you are suppose to keep them (Steel) dry. Some rain may be inevitable for it. Getting caught in rain on the way back home commuting. Taking in on the hitch bike rack to a vacation a couple of states away getting caught in the storm, maybe it raining while there, etc... So it will likely be subject to some rain without an easy or necessarily quick way to dry it. How fast does it corrode?