I'm also a scrounger of stuff for model building. Pop can aluminum, cat food can aluminum, and disposable turkey roaster pan aluminum make great scratchbuilding materials. Every piece of electronic equipment that is disposed of is first disassembled to harvest the model parts & supplies hiding within. Old o-rings have possibilities. Cigarette package foil (from the days when I smoked). Any piece of plastic or metal with interesting shape or texture is scrounged away. I used to save any automotive light bulbs for the filament, but I just buy cheap ones now as unused filaments are more robust. So many things. Been doing it since I was a kid. It fun making use of some random bit of scrap for a model project.