I was watching American Hot Rod (I hate the show) and the body shop was using lead to level the doors. I never thought about the health hazards from this, is it really lead? Lead has been used for years but it is one nasty toxin to the nervous system.
It's been a while since I've used it or read up on it, but it is safe if you are careful. Don't heat it too hot and boil it off, and don't sand it in such a manner as to cause fine particles to become airborne. I used lead in one place on my grey GS and I think that's the only place I won't have to redo!
I remember that episode and seen them grind on allot of it with out a mask on. But later when they do the skim coat of bondo and sand. They all have mask on.
A special file called an English body file can be used to cut it close to the proper shape. I've read somewhere in the past not to use air sanders because it stirred up a lot of dust, but I may not be remembering it right.
you must ware a resperator, (full face, or supplied air if you can) when you heat it up or do eneything to make it airborn, also rubber gloves so it not obsorbed threw the skin, it can also get in your system threw your tear ducks ,so protect your eyes also. SAFETY FIRST