However, he also looked inside one wing inspection hole and found small amounts of corrosion inside the wings on the skin, structure and fasteners. It is a combination of rust discoloration and also white-like powder (aluminum oxide I think). He thinks it is typical of airplanes this age and should not prevent me from buying.
This is quite common, virtually the norm. Since Cessna did not prime the interior of the structures, the bare Alclad aluminum is exposed to condensation, salt air, enviromental pollutants, etc. Unless an airplane has spent all its life in the western desserts, you can expect to find this fine dusty white powder in almost every Cessna you look at. It will be especially noticable on the inside of the upper surfaces of the wings, which is due to condensation clinging to the skins.
The best cure is something like CorrosionX or simply to do nothing at all, buyers choice.
Its there, deal with it or pass. If you want a truely corrosion proofed airplane, buy a Cessna with a seaplane package installed at the factory, or buy an older Piper Comanche.
Charles
