1. Textured foil wrapper from some brands of cream cheese, have a quilted effect that is perfect for small scale 'sound proofing curtains' as used in aircraft interiors of a certain vintage. Nice detailing material, and with the 'backing film' that it has, the pattern won't 'crush out'.
2. Fabric netting used sometimes for veils, comes in a wide range of colors and makes great small scale 'chain link fencing'.
3. Frozen juice lids: steel disks with a rim. Great for brush painting palettes, skiff for holding a squeeze of putty or dabs of CA or PVA glues. Plus, can cut up for metal to use with RE magnets for 'latching'.
4. Foam meat trays. Well cleaned, makes a good source of pads to use with wet and dry sand paper.
R/ Robert