Lead body work
I’ve used that kit.
First, the new stuff is pretty much all “lead free”. So the lead poisoning risk is very different than the stuff that was used “back in the day”. You should still use all the appropriate precautions and protection according to the instructions. And of course if you’re removing the original stuff, that will have a much higher lead content and you should take the appropriate precautions.
The Eastwood kit is easier to use than real lead, having used both. It has some of its own characteristics, but it’s fairly easy to do small areas like the body seams and things that were done by the factory. I used it when I replaced the tail panel on my Duster and will no doubt be using it again when I do the quarters on my Challenger.
It’s expensive stuff by volume, but it’s s far superior way to do the body seams compared to most of the body fillers out there.