I did my Legacy 2 years ago and my Cardinal over a year ago with Klasskote, they are both just fine. Very durable finish. The white even stayed white with no yellowing yet.
I WAYYYY over bought the colors in quarts. It takes very little to shoot a plane, and can be as light as dope. I should have bought pints and spent the rest on more of their thinner.
It takes a little planning to use the stuff, because you have to mix the part A color with part B hardner mix and let sit at least 30 minutes before you can add thinner to it for spraying, then you can put it in your gun. I use glass jars, and let the mix sit in a tray of warm water with the lid on for that time.
Touch up left over is only good for a day, so plan accordingly. You must clean your gun ASAP when finished spraying, as is a good habit no matter what material your shooting.
If I ever get the Avanti off the bench, it will be done in Klasskote as well.
EricV