Looking at Khmer makeup, this matter was happened for quite long time ago. That is, it was particularly in pre-Angkor and after Angkor era from 9th century to present time. In Angkor era, Cambodia was a great empire in Southeast Asia and King followed Hinduism religion. Accordingly, the King had to respect for the God and so he had to have some pretty girls who did makeup (i.e Apsara) and danced to offer the God so that the King might request all happy and peaceful for the whole kingdom. Each girl has to do makeup with several natural cosmetics from wild forest. Note that at that time rhizome (i.e. turmeric powder, several kinds of ginger) played important role for those girls to get a makeup in place. Right now, this product has been still popular and used in Asia countries such as India, Myanmar, Thailand, Cambodia etc. Note that turmeric powder has been applied to the face, hands legs, and sometimes across body.
Now, we may see some images from Khmer Apsara makeup, but all women may do not makeup with natural cosmetics, but with modern cosmetics from western countries, for example, France, Japan, and etc. Therefore, Cambodian makeup has been used for long and long time ago and substances may be less and lesser in comparison with current makeup substances because current substances are originated from chemical substances indeed.