Thanks for the tip. I had learned this through experience but did not know why it worked.I am sorry that I have come late to the party. I sell Corian for non traditional uses. I also sell CA.
CA is an unusual adhesive in that it does not bond in the presence of oxygen. So the CA on your top is just dried. The chemicals that may have affected your top were not present long enough to etch it.
Simply use a razor blade and scrape it off. Your finger nail may do. If you scratch it just sand with 220 sand paper and buff with a gray ScotchBrite. This is good for the most common finish.
I hope this helps
- Ken Dolph