Putting apartment up for rent.
Just want to fix this hairline crack without replacing the whole sink. It's about 1/16" deep (can just feel it with the tip of your fingernail)
Is it possible? How?
Acceptable fix - replace sink. If you have a "Habitat for Humanity ReStore" nearby (or some other "thrift store that deals in fixtures") it might not even be that expensive. Doesn't need to be a fancy overpriced brand but it needs to be intact.
Slumlord fix - epoxy or leave as is. It will never be "right" short of replacement. It will lose you renters with reasonable expectations, as they will smell slumlord when they see that sink at the apartment showing and keep looking - elsewhere.