Step 1: Ingredients and Tools
Inexpensive plastic skeleton
Expanding spray insulation
Wire or coat hangers
Balloon, size of alien head. Have a couple spares just in case...
Paper Mache supplies - paper, paste, etc.
Blood colored paint (red, green, blue, purple, it's your alien) - if spray paint, use plastic friendly type
Gloss coat - spray or liquid
Gray paint - or any other acceptable alien skintone.
Black acrylic craft paint or india ink.
Optional - latex paint, any light color, or white glue.
Optional - lenses from dollar-store sunglasses
Optional - packing tape
Slicing/dicing utility - knives, rotary tool, laser, what ever you feel comfortable with.
Pliers and/or wire cutters