Remember the 3 old lawn chairs I bought at the Syttende Mai sales? I just replaced the fabric on one of them. It's technically kind of a cheater's Finished by Friday, since only one chair is done so far, but hey.
Wal-Mart had this printed cotton duck. It looks quite like awning striped canvas except that it's just printed, not yarn dyed, so only one side looks good. I doubled the fabric so that the unprinted side never shows, and that did the trick.