i watched a doomsday prepper show one time.where a father n son casted some rounds after the dad had gone out n colleted some whights that was used to balance car tires.they melted it down,then cleaned out the crud debree n all.then casted the rounds
What you need for smelting wheel weights is a cast iron pot (not too big!) and an outdoor burner of some sort. My gas grill has a side burner which is what I use.
You need a ladle that is either slotted or has a narrow spout for separating the crud from the lead.
Fill the pot with wheel weights and fire up the burner. After a while you'll have a sea of molten lead with crud floating in it. The hard part is scooping out the crud without wasting too much lead. You need to keep stirring the pot and you need to flux it with beeswax or rosin. Try to stay upwind of the pot, as there will be some unhealthy fumes.
Then pour the lead into an ingot mold. I use a cast iron cornbread pan for an ingot mold.