I will have to try WD40... Its one more use I can add to it I usually put a rag over each rotor before I spray it down.
no, just spray the rotors. it keeps them and the little bolts from rusting while the bike sits. the pads only bust the corrosion off the braking surface, but the hats (center part) will corrode. and if the WD eats your pads a little, so what, pads are a fraction of the cost of rotors. spray the chain so you dont have to waste chainlube on it while it sits in storage, that way you can just hit it with a bead of lube right before your moto.
Just spray the whole bike, top to bottom, then get a clean rag and wipe the excess off the top surfaces of your plastics, seat, grips. buy it in the large gallon can, and put it into an old spray bottle.