On Jul 2, 2006, at 2:23 PM, Doug Barnette wrote: > I used Simple Green on a 99 996 and it coated the aluminum with a > white powdery film that was a pain to remove. Simple Green has a pH of 9.5 which is ten times more alkaline than baking soda (8.5) so you need to rinse thoroughly after using it on bare aluminum Larry Kelly '95 916