May be use it as a one time coating for the heat shield? (Pre-hardened as you propose) Then the tile can be re-used with just new spray coating between flights.

Tesla shorts have been spreading thousands of outright lies over the years, the SEC never moved a finger. There should not be any difference in this case, with the added bonus that everything they state was public knowledge and they just made a list. If they investigate someone it should be Nikola and why they changed from "we have an amazing proprietary technology" to "we will have everything built by someone else and just put our badge on the vehicle". This is going to be the next Theranos. I wonder if the partners that cashed their shares knowing it was all hot air have any responsibility in this.