I wish I knew about this forum a few weeks ago when I first started my project. Anyway all the information is great and I know it will come in really handy as i finish my project.
Here is a picture of my project and some of the mistakes I have made. the trailer is almost 6ft wide and i didnt know they made aluminum sheets that wide so I simply overlapped the sheets and used molding. not the most attractive but i think it should keep the water out.