Teardrops n Tiny Travel Trailers

I bought the aluminum about a month before I opened it to use it. During that time it sat in my driveway wrapped in cardboard and strapped to a pallet. This apparently is not the way to store aluminum, and this is what happens when water is drawn between sheets of aluminum in contact with each other by capillary action.

Luckily the other sides of each piece was usable so I could face this bad side to the inside. Another lesson learned the hard way.