Several people really liked my homemade headcrab figure, so I decided to show it off and describe how it was made.
It's made up of 3 layers.
First, I used aluminum foil to form the general shape of the body, then I strengthened the legs with wire running from front to back.
Then, I used this white plaster cloth stuff that will dry around things if you dip it in water. This smooths it out.
After all that, you just paint it, and you've got the coolest dust collector ever! The only problem with all this is that it can end up looking a little... lumpy.