can I use lead to seal an exhaust leak>

Cheap is a mission on this beater. I used VersaChem Muffler weld. Its like a gray paste, looks/acts just like JB going on. Turned to rock in 24 hours without heat. The system was not paper thin, only where I ground the weld to make it look pretty. Of course once you get a blow-through, its hard to start building with what took it down. Im totally satisfied with what I ended up with. Sealing pinholes with a stick or flux MIG is like killing gnats with a hammer. Replacing is a solution, but not this time.