The school will be performing a disco pantomime (70s and 80s era) and I need some foundation to give the appearance of tanned faces. Which colours should I use?
Under stage lighting I suggest using 1027 stage men for a natural light tan on the girls and 1014 for an orangey tan on the boys. If you use cream you will get a more realistic look.
Cake is cheaper and quicker will look a bit more artificial but this may suit the style of your production.
There is a good section on 70s and 80s makeup in Rosemaire Swinfield's book "Period makeup for the Stage"