Having gone through a couple of years with a table with oddball pocket facing angles, I think I can safely say the customer is going to regret the decision of going the cheap route and not replacing the cushions.
I have seen layers of tape used before.
hot glue used many times by a famous west coast guy hate going behind his work everything was hot glue gunned together.
seen layers of rubber cement and rubber sanding dust mixed.
those are the almost works..... find picks of the WTF ones