I have been doing some investigating and found a local body guy that knows how to do lead seams. His first question to me was, "ARE YOU STUPID"? Why do you want to use lead. I told him why and he asked again "ARE YOU STUPID"? He gave me some information on other body seam sealers. He told me about the Devon Epoxy Aluminum or Epoxy Steel. He told me to contact 3M and talk to there tech line and see what they have that would work best for what I'm doing.
Again Thanks to everyone for their help and info.
Rob
I'm working on getting pictures, having trouble with the link to dropbox.