That is a new one on me, Chef.
But what the heck, give it a try. I started with propellant cans too.
I watched the Youtube thing, it's pretty straightforward. The obvious compromise is that you can't do thin lines and you can't really control the flow pressure. But I see some basic good points, mainly that unlike rattle cans you have control over the paint color and thickness. And it paints a stripe about an inch wide so you do have some control. Actually I could see this being pretty useful for car models.
Now, about the paint. It comes with some colors, and they are pre thinned out to work with this deal. But they are whatever color Testors felt like selling you. I'm not an AVG guy, so I don't know which greens and browns you need, but other folks sure will. And you do want to at least get close, plus the neutral gray bottom.
After you get the hang of this dude, I might suggest you do the following. Go buy four or five of the little square Testors bottles of thinner. Pour it into a bigger jar with a tight lid, like the maraschino cherries came in, and put that aside. Oh, and while you are there get a pack of their clear poly eye droppers.
Let the empty bottles air dry. This is now your paint mix collection. Get the enamel paint you need in the right color, or make some if you want. Pour a little into one of your clear bottles. Add thinner with your dropper until you get a consistency that seems to be like what they sold you, probably about like water or black coffee. Not the kind from Kona that you can stand up a spoon in, but more like the DnD stuff.
Shake it up and give it a try. If you can master that you'll have a pretty useful tool there.
My guess is that this stuff will take a while to dry, like a LONG while, days. But that's ok, there's plenty of other stuff to do.
Like look at pictures of restored P-40s online. I see there's quite a bit. My sister's mother-in-law, great lady, was a stewardess on Cathay Pacific right after the war and knew quite a few of the AVG guys.