I used saran wrap to coat some plasticene models of masks or faces that
the students in Art I did. They then did pariscraft over that and they
pulled off easily. sopme students did multiple copies and mounted the
mask/face "things" onto a board. it worked well. i would suggest getting
SARAN WRAP not store brand or ones that are not as clingly and perhaps
coating head once well and then put a second coating over that can come
off with mask. I did it on the plasticene because I wasn't sure of the
effects--I didn't use the best grade which was the only problem.