This was one successful experiment. We had an extra 1/2 gallon of raw milk last week and decided to make homemade cream cheese and whey with it. I use the word "make" loosely, since there wasn't much effort involved on our part, other than waiting around for the milk to separate.
When it seemed like it stopped draining, I gathered the muslin and tied it into a little sack and hung that from a wooden spoon over the pot. The whole contraption went into the fridge overnight to finish draining.