I checked the California regulations for Cosmetology and there are exceptions to practicing Cosmetology in a licensed establishment.
Basically, entertainment industry is excluded from requiring employees to be licensed Cosmetology professionals. Also, retail establishments are excluded. And, you may perform unpaid work outside of a licensed establishment (volunteer work).
First, you need to know what the practice of Cosmetology includes. You'll find that in CODE 7316
This is copied from 7316-1 (A)
(1) Skin care is any one or more of the following practices:
(A) Giving facials, applying makeup, giving skin care, removing superfluous hair from the body of any person by the use of depilatories, tweezers or waxing, or applying eyelashes to any person.
Then. you need to look up exceptions to the licensed practice of Cosmetology.
You'll find exceptions listed in CODE 7319
Specifically, check out 7319 - C
You'll see there are exceptions in California law for persons employed by various industries including the theatrical, radio, television and motion picture industries.
And, then check out 7319 - E
This explains exceptions for demonstrating or selling products.
(copied from Code 7319 link).
Exceptions to practicing Cosmetology in a licensed establishment
7319. The following persons are exempt from this chapter: (a) All persons authorized by the laws of this state to practice medicine, surgery, dentistry, pharmacy, osteopathic medicine, chiropractic, naturopathy, podiatry, or nursing and acting within the scope of practice for which they are licensed. (b) Commissioned officers of the United States Army, Navy, Air Force, Marine Corps, members of the United States Public Health Service, and attendants attached to those services when engaged in the actual performance of their official duties. (c) Persons employed to render barbering, cosmetology, or electrolysis services in the course of and incidental to the business of employers engaged in the theatrical, radio, television or motion picture production industry. (d) Persons engaged in any practice within its scope when done outside of a licensed establishment, without compensation. (e) Persons engaged in the administration of hair, skin, or nail products for the exclusive purpose of recommending, demonstrating, or selling those products. (f) Persons who render barbering or cosmetology services in an institutional program during the course of and incidental to the incarceration or confinement of inmates, prisoners, or persons charged with a crime. However, all of the following conditions shall apply: (1) Those persons shall complete a barbering training course, developed by the Department of Corrections and approved by the Department of Consumer Affairs, in the proper care of instruments and the prevention of infectious diseases. (2) Those persons shall successfully pass an examination, developed and administered by the Department of Corrections, on the proper care of instruments and the prevention of infectious diseases. (3) All barbering facilities located in correctional institutions shall be subject to all appropriate health and safety sanitation standards, as determined by the Department of Corrections.