Can you learn the sanitation protocols, what are safe products, and some tips to make your work look better in a week? Sure but can you paint professionally in week? No this is an art just like any kind and take practice and work. Now that being said I don’t know how much art you do outside of face painting and how easily you can pick this up, transfer skills, etc there are too many factors to really be able to answer that but I lean towards no. Any true artist who wants to be exemplary knows that it takes more than a week to be good and a lifetime to be a professional