I think, in truth, that most of us meet a specific need in Photoshop and google an online tutorial at that point.

I have often, just for fun, taught myself a particular technique, but having not used it for a couple of months find it impossible to recall when I eventually need it for real.

But if you have particular techniques you think might be pertinent to aviation photography and care to invest the time, then feel free to post.

Moggy