The Jewish Household

It has often been stated that no individual person is indispensable. In spite of all rumors to the contrary, the world continues to go on apace even after we have departed from the scene. Yet, there is an important caveat to this corollary.

Is there any way to Kosher an expensive china set? is there any chance to eat during Pesach food that was cooked in a pot that was used once for Chametz?