Fuel
plans
ignition
home
ammo
firing a spudgun
Don't use petrol or gasoline for the fuel. Use hairspray or deodorant if you want that your guns smells good. After every day of shooting you have to clean your chamber of the burned hairspray. Spray about 3 à 5 seconds of hairspray. Don't use too much or your spudgun will explode.
http://www.oocities.org/CapeCanaveral/Launchpad/3865/propallent.html