Last time I made boolits I left the pot empty. I was using roofing boots as my lead. Anyhow when I went to use my pot today it had redish flakes all around the inside of the pot.its a lee 4-20 bottom draw melter. Any clue what this might be? Is it safe?I mean I scrapped it out mostly and filled it with lead and moved on but wanna know if it's super dangerous or just regular danger. Thanks guy n gals!