Wings don't have covering on them. In fact, yesterday I even pulled the one fuel tank, which wasn't easy or fun. The other tank I'm assuming is cracked too, but I can't tell because for some reason, the previous builder sprayed the area with zinc chromate. I'm going to clean it off today and see how it looks.
This a project that I bought. I'm having to replace the front spar in this wing due to corrosion I found after discovering a rats nest in the covered wing. I have the front spar off. It had been stored for a couple years. I removed the covering from both wings to look them over, just to be on the safe side. The other wing looks great, but not sure about the tank yet.