The recycling process, which is usually straightforward, is often misunderstood and can cause confusion with the sorting machines. Crushing aluminum cans before recycling can contaminate an entire batch of recyclables and attract roaches, rodents and other nasty critters. All types of metal cans that are recyclable include Beverage cans, aerosol cans, and cans containing liquid or food left in them. However, if you remove paper labels from metal or aluminum cans, contact your local recycling facility. The recycling process for metals and plastics is different and each plant has its own unique machinery with different capabilities.