Check with your tire store for a bucket of wheel weights. Separate the trash, stick ons, clip ons, scrap metal and zinc. Zinc wheel weights will have ZN on them, most of the time. Lead stick ons will be a medium to dark gray color. Melt the stick ons separate from the clip ons into ingots and labeled. Hold the heat between 650 and 700, if zinc gets in the melt it will float, it melts at 728. I pour the melt onto an aluminum baker's sheet as silver dollar size and cornbread sticks of 1 lb each. Easier to mix for the hardness I want. A thermometer is your best friend. Lyman or RCBS 1,000 degree will cost $40 to $45. A King Kooker 750 degree will cost $10. Collect the scrap, drool and zinc, sell it as scrap to get some of your money back.