Acetone is a major ingredient of cyanoacrylate super-glue and is also what to use as a solvent for it.

Another way to remove it is by rubbing with oil. The instructions for what I have mention that to remove dried CA from skin is to rub it with vegetable oil. I have done that and it just rolls/peels off with a few minutes of rubbing.

I would go with the slow cure epoxy for the strongest permanent repair.

I have found that using thinned CA for a sanded-in finish can be really nice and tough.

JMHO

Courtesy of a WOMBAT
* (Waste Of Money Brains And Talent)

YMMV