can I use lead to seal an exhaust leak>

yeah, probably wont work if I have to get everything glowing. Ill go with the long SS lap-joint band clamp , cut the system in half again and use some stick to seal the holes ( Flux MIG just craters, I can back stick hole with copper spatula to fill) and use air pressure and a bottle of soapy water to test for leaks. Jeez what a can of worms! I just read that lead wont stick to clean steel. Well, none of this stuff is clean. I think the muffler is "aluminized"
and the adapter is just straight slightly oiled exhaust pipe stock from a shop.