I painted in all the darks of the mannequins first, mixing cool or warm blacks from ultramarine blue, pthalo blue, cad red light and quinacridone red.
Acrylics can be very transparent, so I would have to go over sections more than once.
These photos show the development of the most elaborately decorated dress on the egg. You see how the graphite was very sloppy, so I quickly blocked in some color to set the design.
I don't like acrylic because it dries a different color than I mix, but I fell in love with the quick drying time making it quick and easy to work all around the entire egg. Oils would have been a nightmare of time and logistics for me.