When treating ABS with aceton it has some effects:
aceton vapour: works very well. When dry, plastic has same color as before.
aceton spray or put into liquid acetone: when dry, the filemant changs color into "whitening". A black filament has turned grey, other colors like blue or magenta got ugly whitening.
Does anyone knoe where this comes from and how this could be avoid? I suggest some chemical reaction with too much free air O² .