It doesn't even take makeup for a person to disguise themselves. A person can change their appearance so drastically without the use of makeup, it's uncanny. With just a shave or a haircut or new hair style, type of clothing, hats, sunglasses, prescription glasses, different voices, accents, acting skills, etc. someone can completely transform their appearance, and seem like a totally different person, but with prosthetic makeup a person can hide their identity all together, and there are millions of people living, working, and existing in mainstream society, who wear disguises every day to conceal their true identities. Secret Chinese agents have been doing this here in America and around the world for a thousand years now. China's Royal Family has used prosthetic makeup to hide their identities since the first dynasty began. In fact, all of the Royal Families of the World use prosthetics and always have. In private, without makeup, they don't look like they do when operating in their public offices. This allows them to move freely in public without being recognized. Not to mention the fact that most of them are guilty of continuous criminal activities, in disguise.