I have an M416 trailer,actually 2, that I want to make a lid for. I want a lid that is strong enough to hold a 130# tent, but lighter than an all steel one. I thought about having one made out of aluminum, but it would be expensive. I can weld steel, but have never tried aluminum, and don't have access to a spool gun. So, I thought about building the frame out of steel and using aluminum for the skin. I talk to a friend who does automotive body work and he suggested Lord Fusor 108B. I called the company and what I wanted it for and they said it would do the trick. Has anyone used this product? If so, what are your thoughts? Any other ideas on how to make a light weight lid would be appreciated as well. FYI. I have looked at a lot of examples on this and other sites. I don't want to make it out of wood, nor do I want to make the skin out of more than one piece. Thanks in advance.