The model master acryl light needs to mixed well otherwise it dries really really light and makes every fig look like Darryl Hannah in Blade Runner after she paints herself.
I generally use camo gray which is a whitish gray for the primer, then I use the light skin tone mixed with a little warm tone. I then spot touch some areas with a citadel flesh wash. When I do the eyes, I started using irradescent white from Liquitex.
Whatever you find that works in terms of color and procedure, memorize it. I've found myself forgetting to many good methods.