I would like to add that you will have to mold the foil to your face shape.  Even the wet papered mask should be 'fitted' as you go along.  I would normally recommend using plasticine or modeling clay but you have a time shortage.  The baking will cut your time immensely.

Can I suggest another approach, based on an idea from David Svoboda.
You need two things - some Modroc or plaster of paris bandage and uncooked pastry mix.
The pastry mix is for a non adhesive release layer.  You roll it out quite thin (about 4mm) and lay it over the face, pressing it into the depressions (eye sockets etc.).  Cut holes for nostrils.
Lay the Modroc over it and allow the Modroc to dry into a hard case.  This doesn't take long.  Lift off the plaster case and pull off the pastry.
You then have a cast into which you can layer about six layers of paper in the normal way.  Make sure that the first layer does not stick to the plaster.
Allow the paper to dry thoroughly and pull it free.  You can then build up the outside with more layering or pulp or other materials to make the final mask.
Good luck