5 TBSP warm water
Mix together the flour and water, this will result in a dough like mixture. Do not add the makeup into the mixture.
Use this mixture and with a bit of regular elmer's school glue it can be affixed to the face or body. Mold the dough or fake skin to desired effect and then let dry. Drying time is at least 10-15 minutes, However after adding the makeup and the fake blood or other gruesome effects the simple skin recipe come to life.