How To Clean Black Out Of Aluminum Coffee Pots

If you collect or use aluminum kitchenalia, this tip from Good Ideas: An Interesting Collection Made By Eddy's may be of interest to you:

To clean inside, slice a lemon and put the slices in an aluminum coffee-pot with plenty of cold water. Let come to boil and keep boiling until the inside surface can be cleaned with a cloth and made to look like new.