On 09 Feb 2004 18:41:46 GMT, (DL152279546231)
wrote:

I have been looking at Zenair's Ch 701 STOL and nowhere have I seen any mention
of treating the inside of the sheet alluminum for corrosion protection. I would
have thought spraypainting with green (zincoxide?) paint woudld have been
necessary


Most commercially built aircraft do not have that type of corrosion
protection unless the 'seaplane' version was ordered. My 1962 C310G
is still doing fine with bare Alclad inside the skins. A lot depends
on the environment in which the airplane is kept. An enclosed hangar
is best. Salty air or continual exposure to water is bad. Zinc
chromate is a pretty good protective coating if you can find it. Just
a light coat on properly prepared metal is enough. BTW, zinc oxide is
white, and not suitable for your purpose. It is the stuff that life
guards used to wear on their noses and looked like seagull **** g.

O-ring