Paint is the first line of defense against corrosion, and a proper paint job is just not cheap. I'd rather have to try to sell a bird with a good paint job and a mid to high time power plant than the other way around...
Paint is not the first line of defense. The thin layer of pure aluminum on the skins is the first line of defense. It's called Alclad, and it's there to oxidize quickly and form a barrier against further attack by oxygen, airborne contaminants and so on.
See if you can get a quick scratch and paint for a reasonable price. Then go fly the airplane.
Don't waste the money doing that. It won't look good, it won't last, and there will be defects overlooked. Like one poster showed, it's best to disassemble the airplane for painting. That way, one finds worn or cracked stuff. Maybe some owners don't want worn and cracked stuff found....
I painted several airplanes. Took them all apart every time.
Bad paint is one thing. But the guy neglected it so long the paint is GONE. What else was neglected?
That looks like lacquer, which was commonly used by the manufacturers up into the '80s. No primer under it either. Lacquer goes on easy, dries real fast, and looks good enough to sell the airplane. But you will note that the aluminum revealed by the peeling paint is not full of corrosion holes.
It's an old airplane. Paint's purpose is to protect the metal. That metal ain't protected. . .
Yes, it is, by the Alclad, as pointed out above. It's just ugly. Paint can add protection if it's done properly, but good work doesn't come cheap.
Paint doesn't fly. Better to have a good engine and airframe than pretty paint.
Yup. Besides that, the most serious corrosion is found
inside the airplane, not on the outside. So many annual inspections are little more than walkarounds, and the interior doesn't get pulled out to get a good look at the structure, and inspection panels aren't all removed to check inside wings and tail and under floors. By the time some conscientious mechanic does the job right, he finds terminal corrosion, cracks in structure, seized control system pulleys, frayed and corroded cables, failing wiring, lots of such stuff.
Pretty paint and a nice new interior sure sell an airplane fast, but in many cases the buyer is getting a pig wearing lipstick.