Is όμορφος interchangeable with with ωραίος here? If not, can you generalize regarding situations in which each should be used?
Agreed. I thought ωραίος meant pretty or nice
Both ωραίος and όμορφος can be used for people, landscapes, sometimes paintings as well, but calling a signature "όμορφη" sounds awkward.
´very fine´ is also correct, not wrong as here marked.
English is not my native tongue but I dont think "very beautiful" is used too often.Its wether beautiful or very pretty.Again,I might be wrong?