I've got all the materials needed to start casting. Jig mold, melting pot, hooks, and lead. The only lead I was able to get is from the mechanic I use. He gave me a bucket of lead weights that they use to balance tires. Can I melt those weights with the little clip on them, or do I need to take that clip off before I melt them. I'm not sure what the clip is made of (maybe steel). Any help would be great. First time casting jig heads!