Heidih, that's a brilliant use of your milk but unless the product complies to health and safety regulations set out by the cosmetic industry, I would not give it to anyone but use it for yourself......you would still be liable if you something went wrong and with no protection, "red tape" insurance, you could loose a lot.
As a hobby to supply yourself its great but if you go big time, you will need to do things properly, that's for your sake and others.......after all, I love making cakes but I would never sell them just in case they make some one as fat as me and I get the blame
My daughter is a cosmetic consultant and has vigorous training all around the world as things change almost daily in the industry as to what you can and cannot use, she looks at cosmetic recipes all the time to check that the ingrediants and quantities comply and are harmless and stable.
Oh,