It looked like a turd floating in the pool... Zink WW... I was smelting a bucket of truck tire WWs and was ready to skim all the clips looked burnt and were ready to be skimed off and shazzamm there it was a Zink turd.. No markings of any kind and it wasen't rivited that i could tell. Now i feel better, i'm more confident that i can catch these before i ruin a pot O lead. So far 1 zink turd to 15 buckets of WWs.