Plastics - I'm not sure I'd include any plastic recycling that requires melting. The fumes from melting plastic are not particularly wholesome, and can lead to wide-scale contamination of the surrounding environment. Cutting plastic down into scoops, labels, washers etc, or making plastic yarn/plyarn seems better. Perhaps something about converting feed sacks into tarps to protect soil/gear?
Glass - the best thing to do with glass containers is to re-use them in their original form; the embodied energy of glass is high, and the energy breakeven is re-use of a bottle about 20 times. Preserving produce/beverages/etc in the original jars/bottles should be the first option. After that, using the bottles as underfloor insulation for earthen floors, or as lights in cob walls etc is a good option. Perhaps join several together to make a solar hot water heating system? Cutting down bottles into cups or funnels for watering plants is also good. Or cutting down jars and drilling a hole in the base for using as plastic-free seedling pots. I have melted bottle glass into beads using a basic plumbers torch, which is something relatively achievable in a home setting, but for making anything big you'd want a proper furnace.
Aluminium - in a home setting, you probably are going to be limited to smaller objects (maybe not a sign), but don't need to be limited to flat things as you can do sand casting.
Other types of waste:
Ashes - fertiliser, soap, lye (for cleaning or preserving food)
Bones - biochar and grind into fertiliser
Reculcant-to-compost organics - citrus peels, walnut shells, macadamia shells, hardwood offcuts from woodworking - mulch or biochar
Hazardous waste - smoke detectors (radioactive), batteries (heavy metals), fluorescent lights (heavy metals), old paint (lead, asbestos, microplastics), stained glass (lead), plant residue from phytoremediation projects, etc. Showing responsible disposal of these types of things is important for preventing soil contamination