agreed, it makes a barrier between metal and water.
and it isn't "magic" the water and oil can not emulsify and the oil in WD-40 adheres to the pores of the metal and repels the water (just like a top coat does on wood) and prevents oxidation.
and it isn't "magic" the water and oil can not emulsify and the oil in WD-40 adheres to the pores of the metal and repels the water (just like a top coat does on wood) and prevents oxidation.