Acidity in apple peels can remove stains and discoloration from aluminum pots and pans. If your aluminum pots and pans are looking a little worse for wear, you can remove stains and bring them back to a shiny finish by boiling apple peels. Put the peels in the saucepan and add sufficient water to cover the peels. Bring the water and peels to boil for quite a few minutes until the stain starts to lift. Turn off the pot and let the water cool. Remove the water and peels, dry the pan and look at the result!