Adding to what cheap said: Denatured alcohol is ethanol with a bit of methanol and is available in the paint department of - lessee...Walmart, Kmart, Home Depot, Orchard Supply, Ace Hardware, Sears....

You can also buy a product called Heet. It's a fuel line de-icer that's sold in a YELLOW plastic bottle in the automotive section. It's pure methanol and not quite as good a fuel as denatured alcohol. Don't buy the red bottle!