Very cheap and easy Halloween prop skull

Step 1: What You Need

I got a skull from my area Dollar store. Very basic, plastic, and cheesy! One plastic bag and either paint or wood stain.
You just need a heat gun and a razor or scissors.

Step 2: Make People Curious or Furious

Cut out the black from the eyes, nose and mouth. Use the heat gun to extend the jaw out by warming the back and sides and slowly/lightly pulling it outward and downward.
Wrap the plastic bag, randomly around the skull.
So you don't burn yourself, use the heat gun on low! Slowly go around it so the plastic starts to shrink down. Once its good and shrunk a little, set it down and slowly start shrinking the rest of the plastic. Let the plastic pull apart, it'll have a more natural rotting to it.

Step 3: Color of the Dead

From here, once its cooled down, add your choice of coloring. Some people use wood stain, but I used acrylic. I like the "juicy" look over the dry look.
Really, this is the rule of thumb for most corpsing techniques. From basic plastic hands and feet to full skeletons. Add personal touches from here. Some mold, a tongue, endless possibilities!
I spent 1 dollar (plus tax), and about 10 minutes. Easy Peasy!
Hope this prop idea helps anyone who is looking to step up their game in Halloween!