Find a good area to work on your skeleton, placing a drop cloth underneath. Fill a bowl with 2 parts liquid starch and 1 part water. Gather plenty of newspaper.
Tear the newspaper into strips. Take a single piece and dip into the starch mixture, squeezing out excess liquid. Apply the paper to the skeleton, smoothing out any wrinkles. Continue the process until the top of your skeleton is covered.
Gently turn your skeleton over and repeat the process on the backside. Once you have one good layer done, allow to dry.
Once the first layer is dry and hard to the touch, you will need to apply another 2-3 layers.
Now that the skeleton has dried, you can begin painting. You will need to move to an outdoor area shielded from wind. Using a gray or brown base give your corpse a good coat of paint, making sure to cover any printing that might show through. Allow time to dry and your corpse is complete.
Display your zombie in a place where it will not get damaged, bring indoors during bad weather. Position a strobe or colored light on it for an even eerier effect. You can also drape "Creepy Cloth" over it for a mummified look.
For safe keeping cover with a trash bag or tarp and store in a cool, dry place.