http://live.warthunder.com/post/33816/ clean glass for plane cockpits, he has about 220 planes done so far.
That's pretty cool. I think that devs have already washed the windows tho. The prop reflections are not as bad as they used to be and not that many duct tape stains on the windshield either. On e change I would love to see is crystal clear glass. Try getting into an Arcade or Realistic game, go into cockpit mode and let your eyes adjust for a minute, than hit V and switch to Virtual cockpit. Make sure that you're looking at the terrain when you do that and will notice a major difference. It seems like this mod got rid of all the useless crap on the windows but didn't get the actual graphics to reflect the true eyecandy of War Thunder.