Hand wash only, air dry...

steve-n-vicki wrote:
my local chevy dealer is certified by ford to repair the aluminum bodies, wonder if they know something ?

Yep. Ford sells 700,000+ aluminum F series trucks a year. If you can't repair them, you are going to miss out on being able to repair the best selling vehicle on the road for the last >35 years. Not to mention Aluminum has been around as panels on vehicles for 20+ years (My 2002 Explorer hood is aluminum) and is likely here to stay.