Tear (or cut) the paper towels into 1" wide strips
Mix up a plaster into a "runny milkshake" consistency. It should be a little more runny than if you followed the package instructions. We don't want it hardening too quickly!
Saturate a strip of paper towel in the plaster mix, and then apply to the model as if you were putting a cast on it. Continue doing this until the entire model is covered.