The step 1 pic shows the different types of stylus that can be made using conductive rubber.
The thumb pic shows most of the main materials used Materials
Paraffin or candle wax
Naphtha solvent from hardware store
Silicone Caulk from hardware store
Corn starch from grocery store
Carbon Graphite powder- Available in larger quantities from: http://www.elementalscientific.net/
Available in smaller quantities at your local hardware store. It's called lubricating graphite and comes in small tubes or bottles.
VeilSheild conductive fabric from: http://www.lessemf.com/fabric.html
Also shown is a nickel plated fabric that is no longer available.
Pen or Pencil
Small diameter brass or metal tubing or rod from: http://www.micromark.com/