@mahmood
Bro, it would be better if you have try to use some other example rather then husband/wife scenario because ironically almost 30% of these acid throwing incidents are done by former husbands just to get revenge on their former wives who has taken divorce from them because of not fulfilling their marital duties.
Now, as you have asked my opinion about such a situation, Yes I will involve some elders of both families so that they could give us a acceptable solution. Yes, the elders of both families are the 3rd person in husband/wife case because they not only knows the problems that was between those 2 and also could spread it the way they like as is a normal but bad habit of our society.
Now, I will ask you question, have you ever heard of punishments to those culprits of such incidents, because I have not and until I heard a single punishment I will not change my instance on this that "This Woman has not Tarnished or in your words Polished the Tarnished face of Pakistan".