Brent,
If you're able to pour it with success don't worry about it. You've mentioned wheel weights... I would recommend fluxing this lead, especially if you notice much more slag coming to the top or have trouble pouring it consistently. Considering that you're dealing with a Hot Pot 2, I would work with a slightly smaller amount of wax or fluxing compound at a time... maybe the size of a pencil eraser. Introduce that to the pot and stir it in a bit. Skim slag again and repeat if necessary.
You shouldn't have to light anything. Just know that it may flame on it's own and will likely smoke a good deal... keep stirring it in and let it run it's course. Like I mentioned, you can repeat as many times as you feel necessary but keep your wax/flux doses low so as to keep the smoking/flaming issues to a minimum. Always work in a well ventilated area.
Shoot me a PM or give me a call at the office if you have any other quesions about it.
Thanks,
Jerry