Ask him when can shareholders expect an update regarding the relaunch. Even though he didn't deliver as promised you don't won't to come off as aggressive or angry, otherwise you won't get anywhere with him. Kill him with kindness even if you think or know he's full of it.
Are the results of the corrosive testing available for shareholders to review?
If not, who was hired to do the testing? What attributes or corrosion criteria are being tested? How big is the testing sample?
It is unknown if such testing has been completed or if it even exists. However, asking for details can help verify the validity of public statements made by evaluating the quality of the responses received.