Copper is sky high right now. Im sitting on probably 300 lbs of bullet jackets from smelting range scrap. Unlike some of you, I have a picky scrap yard owner. Even though maybe 5% of the jackets are brass or bimetal, he spots them every time. I need a way to shine them up so I can spot and pick out the non copper jackets. I'm sitting on a $1,000+ payday and need some advice.