Line check in a single pilot cabin class twin (sked 135) many years ago, with my static cling film shade (dark green) up front and center between me and the early morning ball of fire. Fed in the right seat, thinks Chieftains are ultra-cool. Asks if the film is company provided or otherwise stocked on the aircraft. The answer is "no, pilot-provided." Mr.Fed: " does it have a TSO number?" Me: "ehhh, no, but if you have a number to share, I have a black Sharpie suitable for field placarding." My lame humor was met with "inhibits vision, not approved,blah blah, blah, testing and certification required, blah, blah, blah - Rosen makes a dandy visor for this plane." Removing the film made him happy, but my statement that see and avoid no longer existed due to sun blindness did not. I never expected any fallout, nor was there any penalty. But my attempt to explain that using any tool available to improve safety trumped silliness about a stamp on a piece of vinyl was met with deaf ears.

FNW guys will recall the silver shades our DC-9sreceive post- 9/11, when taxiing with the cockpit door open was over. Of course they weren't approved for anything but parked at gate; which gave you a chillier baseline to begin your low airflow taxi from. Combined with popping a cockpit window and manually closing the outflow valve, comfort could be attained in summer ( another unapproved technique, fraught with peril of not deactivated in a timely fashion). But above 10,000 those shades outperformed USA Today about ten fold! The eyebrow plugs often stayed up, and there was a movement by some CPO geeks to catch you with the eyebrows covered on the taxi in. Comfort and skin cancer avoidance take precedence with me, so I'd say make your shades and deploy prudently.