So according to that article the calcium molecule in milk is a covalently bonded molecule (the electorns are shared between phosphate (PO4) and Calcium (Ca) as apposed to being stripped from one atom in an ionically bonded molecule. Anyway, the point being is that Calcium Phosphate is a covalent compound and therefore would not work as a spray for fruit. However, Newts idea about spraying milk around the feeders for the roots, theoretically would work.
I think I'll give it a try. Cheaper than buying a bag of bone meal.
(What I do for my whole garden is collect the eggshells from the Cafeteria at my old University and crush them up (bucket of them) and add them to the soil. I also collect the eggshells from my mothers place and from my room mates. Works well.)