If you're a make-up artist you can do your arty fashion work, and subsidise this with commercials. They pay really well. I ask her. Training can be carried out at colleges and short courses where the basics are taught. However the best make up artists keep abreast with current trends and product.
New products are like latest releases in publishing.
They slip into the market sometimes unannounced and then create a great big fuss. It's all in the blend. It's all in the blend. When the shoot wraps she is the first to pack up, and the first to help the others with their gear. Make-up artists are usually friendlier than models or photographers, maybe because they have less stress, and less expectation riding on their work.