Just be carefull if you are using commercial TFR (Traffic Film Remover). Some brands have a high Alkali or Acid content which don't do Aluminium Aircraft any favors. Try and find one thats neutral. They are a little more expensive but work just as well.
Aluminium has a good durability against many chemicals. Low or high pH-values (less than 4 and more than 9) lead to a dissolution of the coating of the oxide and to a rapid corrosion of the Aluminium.