[garynortheast]

Put ACF50 on with a cloth. You don't need a lot. Spray a little on to an area and then use the cloth to wipe it on/spread it. It works everywhere - metalwork and plastics although you are well advised to keep it away from the brake discs otherwise you may be in for a nasty shock when you try to stop.
Generally if you are going to ride the bike over the winter I'd advise giving it a thorough clean and then use the ACF50 on it. No need to keep reapplying it, if the bike gets particularly dirty just rinse it down with cold water so any salt doesn't become activated by the heat of warm water. You can always give it the odd reapplication over the winter just to keep the protection levels up, and then in spring, give it another good clean.
Make sure any areas of broken paint get a good treatment, it's a very good rust neutraliser/inhibitor.