I've had good results repairing otherwise impossible (?) to repair plastic stuff with UV activated Bondic:
https://v20.getbondic.io/offer-01/?lpid=...e=United+States

There are other brands of the same/similar stuff, I think.

Yes, acetone is nail polish remover, among the other things it removes. It should only be used with excellent ventilation; it is not good stuff to inhale.

I've not heard of using it to attach broken plastic things back together.