I'm getting a new road bike. Would a light spritz of teflon spray help in repelling dirt and moisture? I wouldn't coat it completely, just focus on those dirt collecting areas, the undersides of the frame, the crevices on the brakes and derailleurs, etc. and of course not the brake surfaces.
It's an "internet bike" I'll assemble myself, so I don't have the guidance of an LBS for these things.