RE: Painted in the Molds???
Just to add to Bob's great explanation, the mold is waxed and and a layer of PVA release agent or two is sprayed on to the mold after it is waxed. And that is how the paint does not stick to the mold.
I have tried this method a few times with varying results. The learning curve is steep, but the end result, well you've seen good examples.