Most zinc weights have Zn on em or nuttin at all , most stik on zinc or steel have no markings .
To make sure any ??? 1s I try to cut with side cutters , you`ll know when ya find a zinc 1 ,I promise !!!
Here`s a pic of some I`ve found in my buckets , but by no means a complete compilation .
To be on the safe side just keep ya melt down around 650* or so & the zinc will float to the top . If ya got no thermometer just melt on low heat & be there when it all liquidfys (temp will be enuff to stir but not enuff to melt zinc , after all the zinc is out turn up the heat & finish cleaning ya alloy !!
Feel fortunate ya got some wheel weights & cultivate your relationship with your source carefully !!!
