I am in the cranky pants group -
send it back with "regrets" and not make myself ill over the stuff.
If the people get their undies in a bunch - so sad, too bad.
I definitely would NOT want to receive a finished item that smelled icky. Why would I want to work on something that smells bad?
(Okay - I lived on a farm - there are some smells there that I probably would not want at a tea party, but they did not make me ill. The smells were "acceptable" outside - but not in the house!)