popa: I’d think so too, but the halacha is not to hang laundry up to dry right before shabbos because of maris ayin. Wouldn’t any normal person think that clothesline in the frum person’s backyard was filled before shabbos?
Itche: I have never studied maris ayin in depth (except for the sugya in YD 87) so I cannot address your case.
Yet, I find it impossible that maris ayin does not take common sense into account. My Hugo Boss suit case, for example.