In racing cars, ballast weight is used to modify performance, as well as to add to a vehicle’s total weight to reach the minimum required for the race. Ballast weight can be arranged to affect the car’s handling by changing its weight distribution. Some people make their own lead or aluminum ballast weights for racing cars. They basically melt the heavy metal and pour it into a mold until it is cooled and safe to handle. Safety is extremely important in making your own ballast weight. Lead fumes are incredibly toxic, so be sure to work in a well ventilated area while wearing a respirator. Click here for a full list of respirators recommended by the Center for Disease Control (CDC). Also, be sure to use a soap specifically formulated to bond with toxic heavy metal residue so it simply rinses away. It is also an effective way to keep surfaces and laundry clean & safe. Simply washing with ordinary soap & water will not significantly reduce the spread of contamination or the danger of ingestion. So BE SAFE by using CLEAN-ALL HEAVY METALS® HAND & BODY SOAP!