Just scored what could be a lifetime supply of COWW and SOWW. The owner of a large commercial truck tire business said I could harvest all the WW out of their 55 gallon barrel. Turns out commercial trucks have mainly lead WW and they're huge! Took about 15 minutes to collect about 100 pounds checking each one with tin snips and I only scratched the top 2". Only about 30% zinc. Owner told me to buy him breakfast sometime.