Mask Fabrication: Preparing the cast

I was lucky enough to have a plaster-cast bust to work on, so I wanted to preserve it the best I could in order to use for further projects later on.
Firstly I sat it up at an angle for the comfiest sculpting position. I then wrapped it in cling film to protect it from getting too messy, as well as to allow complete removal of the mask sculpt, if and when necessary. Finally I drew in the eye shapes using a simple board marker, to make sure I didn't sculpt over the essential areas that needed to be left alone.