Please wash and squash steel (tin) cans. Aerosol cans can also be taken, but must be completely empty. Steel cans are 100% recyclable. They can be recycled over and over again into new products like bikes, cars, steel reinforcing rods, fencing wire and of course new steel cans. Steel cans, often called tin cans, have only a very thin layer of tin – 15 millionths of an inch thick to prevent corrosion – thinner than the skin of a soap bubble. Most steel is recycled in NZ. Steel cans are sent to scrap metal dealers.