I see Christopher has already chimed in with some excellent observations on this discussion. I think we all go about this in such different ways to achieve the Vintage Hollywood look, that it's difficult to say that there is one right way to go about this. It's also important to keep in mind that with several light sources you have an opportunity for disastrously conflicting shadows. This in itself is a big obstacle to negotiate for the student.
I think someone mentioned earlier that George would rub oil on his subjects but in reality that was rarely necessary as the subject was already sweating from the heat generated from the lights. He liked to keep the sweat on the subject then blend that on the negative with dyes for the Hurrell Glow that we all have come to love. He would also use crushed lead to create the burnished effect that is also an earmark of the Hurrell look.
I create my images more and more with digital (duck and cover) but I still use my Linhof Super Technika and vintage lenses, including a Verito and an Imagon for a beautiful glow right at the pull of the trigger.
You can practice good lighting technique very cheaply with nothing more than cheap Home Depot parabolic work lights, some cardboard and pony clamps for light control. This is how I started then rewarded myself with some more expensive Moles, B&M Keg Lights and even the modern Desisty fresnels once I got a handle on controlling my light and their ratios.