EDIT: Thanks to all who participated. Relevant information from this topic has been merged into Improve Clarity with Lens Coating/Cleaning with Nanofixit and Similar ; extendedInterface - Project Scope, How it helps 8kX, and How 8kX Impacted Development. This topic is no longer intended as an official submission to the It’s 8KX! Event’
A very cautious attempt to harden the lenses of the Pimax Vision 8kX with a kit offered by Nanofixit.
tldr - Did not cause any degradation (did not hurt), may or may not have helped.
Very thin glass (or similar) coatings may not be enough to harden soft underlying materials against deep scratches.
Chemically, this kit may be using simple sodium silicate. Lack of stress in the resulting glass surface after evaporation of the water provides a plausible explanation for claimed hardness. Hundreds or thousands of repeated spray/evaporate/polish cycles with this chemical in a controlled industrial environment may yield far more unambigious results, although such application may require a dedicated machine.
Diamond-Like-Carbon Coatings may also be worthwhile for VR headset lens hardening.
Alternatively, Nanofixit may be based on research such as this.
Demonstrations of the Nanofixit product at CES 2020 were nonetheless seen as impressive, and may have used materials of more usefully varying hardness.