decorative animal shapes that I made for my kids room I made from an old pressure cooker. Its very easy to order online ready processed aluminum ingots however I think it takes away from the fun of looking for scrap parts and processing them from scratch into something new. There are many types of aluminum objects made from different alloys that can be used by the amateur metal caster. On the image at the left you can see different types of objects that I melted into clean aluminum ingots. For example an aluminum scooter, brackets, pressure cooker lid, baby pram frame, flood light frame, electric box cover, door handles, solid aluminum engine block, ladder parts, engine piston and old antenna tubes. Another point to rise is that for many metal casting hobbyists there is no need really to segregate the aluminum alloys for a simple reason, not too many people are casting in their back yard, Aluminum parts such as engine pistons that requires unique grade of alloys because of the unique mechanical purpose of the object. Most homemade foundry metal casters that are doing it for a hobby will usually create decorative objects that will sit on the shelf or be hung on the wall that's why it doesn't really matter the alloy segregation. However after saying that it is a good practice to make the metal casting from the same alloy if possible.
One source of aluminum I wouldn't really recommend to collect and melt is aluminum tubing. The volume of aluminum to be extracted is very low and the time consumption of the melting session is just not worth it.
I got a total of 1.5-KG aluminum and 1-K.G Dross (scrap impurities).