[Nonfractal]

PiP,
I have used the abrasive fluid from an automotive headlight cleaning kit to remove superglue from slotcar  injection molded  crystalwork.
It is a lot of work and the results are good but not as good as a new replacement crystal work kit.
It might work for vacformed parts but I've never tried that.

The fluid is a  very mild abrasive . Maybe any very mild abrasive would work. 

Hope this helps
AlanW