here i will explain some experiment that i have done recently about glue.
ingredients:
a lot of styrofoam
acetone (95%)
cup and stricks.
pour a little amount of acetone into a cup and start adding styrofoams pieces into it.
styrofoams will start to dissolve.
do this until the mixture becomes like a honey viscosity.
then apply it to the surface to glue and compress it. when acetone evaporated (which is very quick) totally you are done. i am not sure if you can keep it in some airtight bottle. i just made it and used it.
this is very very strong glue that you can use in some parts.
i have successfully glued,
woods, glasses, plastics, 3d printed materials, papers...
best.