Working on somewhat of a budget i have the need to shred aluminum sheeting. I have a foundry with a 4 inch crucible and would very much like to shreader the plethora of stock car bodies at my disposal. I'm unsure what Guage the car bodies are but you can fold it by hand. I'll mostly be shredding this and aluminum cans in order to compact them in a can bailer into 3 1/2 inch cylinders to feed my foundry. I've looked at several shredders but they all seem either too small or greatly out of my price range. I've looked into possibly using an old wood chipper but I've heard the blades would easily dull and may not even shred aluminum at all. If anyone knows of any online plans to build my own I'd be grateful. I have or will purchase the motor required to run it. Hopefully electric. Thank you for any input.