GUEST, great sdviseOn a serious note, as I used to work in a factory that produced lead products, That "frosting" is lead oxide (PbO) and is more harmful than the lead itself. It can be inhaled or ingested by either skin or mouth contact. It is considered a poison and in extreme cases has caused death. The most common symptons are stomach pain, vomiting, headache and blood in the urine. I personally re-melt balls that have oxidated.