Go with what Warumono said about the gloves, that will work great.
Yeah, you could try using a plastic mask, but you might have some difficulty getting it to stick to the plastic. They're cheap, give that a try. If it doesn't work, you could always make a mask of your own face in plaster strip (get a friend to help, make sure you have your hair covered with a shower cap, and coat your skin with vaseline), then model over it with more plaster strip to get it how you want it. Then you can use the fine plaster and/or Gesso over top, and sand it a little to get a nice smooth finish. You can also use a transparent gloss sealer over top if you want the final version shiny.
There might be some way to use fabric . . . then it would be more breathable . . .
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