If you want to try another way. Fill a small container with future and use food coloring to tint it the color you want or the color that would change the yellow to the shade you want. I then polish my canopies with a wet dry sanding patch kit. I then use regular, not gel, toothpaste and polish up the plastic with that. Once you are satisfied I use dental floss and attach it to the inside frame of the canopy with a drop of clear glue. I then dip the whole thing in the future, let it drip for a few seconds, then put it under a bowl, palstic container, or what have you, and let it dry for a few days. You get crystal clear, glass like canopies with this method.
I will say though, after watching film footage, and looking at pictures from the web, I believe that the canopy really is a smoke color but has a mirrored finish on the outside thus giving it the "look" of a gold canopy such as the f-16. You can view th ehigh res full size pic here
http://www.flightglobal.com/airspace/photos/menace/images/24797/f-22-raptor-nellis-2008.jpg
Brent
1 VP - PPCLI 89-92 A Coy RED DEVILS
I mean, I had fast motor cars and fast motor bikes, and when I wasn't crashing airplanes, I was crashing motor bikes. It's all part of the game. — Sir Harry Broadhurst, RAF, 12 victories WWII