With the tin cans it was just an idea to get a Reg. source of scrap. I know it don't pay much but u could get them every ware. I live in the country so water to wash them out is free also have 8 yeAr old son lol and for oil filters there r tons of oil change shops around you can turn in oil at landfill but its only like what a pound of steel Need 2000. To make a ton or so. I just nought of you had say 10 businesses you pick up from reg p,us curb shopping it might be a start till you get 30 business's ext..... Bit I also know its low grade bs work just wondering if it was worth it. Or am I making a fool of myself also printer cartridges. We have tons of payday loan stores that us a lot of ink... Just saying