Don't get a warranty on the wood I use to build projects. Why should
I care any differently about the Corian that I plan to use for similar
work?

Corian is really pretty tough stuff, I can't imagine how you would break it. My
wife has a piece across the tailgate of her truck and in spite of construction
workers throwing all sorts of stuff in there she just has a few scratches.
(She is a construction manager and uses this for a flat surface to mark up
plans etc)