I dont think there is any harm in leaving it without clear coat. When I stripped mine, I was amazed at how good it looked. I would have left it alone and not polished mine if I didn't have the dreaded APB (Airstream pattern baldness) on the front and rear end caps.
I stripped my clear coat about 2 yrs ago. It still looks better than it did with the (balding) clear coat on... I haven't really noticed any oxidation. I'm sure it has, just not glaringly obvious.
I don't know if you need to leave the stripper on overnight - seems that it would just dry out more. Guess it depends on type of stripper you're using and the humidity. I did have to apply 2 or 3 coats at my banana wraps to clear all the coating & grime.
This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.