Originally Posted by SEA_Tigger
I imagine when it comes time to clean a plane, they put a retiring pilot on it for their last flight so they can run it through the water cannon salute.
Seriously, how much dirt can adhere to an airplane moving over 500 mph? Wouldn't that kind of breeze tend to blow off most dirt during flight?
Add to that the frequent rain, snow and de-icing sprays in the winter and I would assume that airplane exteriors are pretty clean.
