Back about 15 years ago my Dads neighbor, a scraper, auto/tractor mechanic and machinist would load the swarf into old cars before sending them to the crusher. That stuff has probably made it's way back here from China now for sale at Walmart. I save my aluminum and brass. I have already melted down some brass in my crucible furnace along with other scrap and made some trinkets. I may do the same with my aluminum. The steel I have been crushing down inside tin cans with an arbor press and giving to a local place that recycles scrap "for free" along with any other steel scrap. I don't have enough steel scrap to bother trying to sell. My Grandfather was a scrap metal dealer so I think it may be in my genes to not let it end up in a landfill.