How long can hard bottom paint be on the hard?

[Dr. D]

My boat has Trinidad SR on the bottom, applied last October. This is the first time for me using hard bottom paint. I know that if exposed to air for "too long" the paint loses effectiveness and needs to be either sanded, or new paint applied.


I can't find what is "too long." If I haul the boat for some work for a week will I need to sand the hull before launching?