QUESTIONS - Are There Sins That Indefinitely Disqualify From Eldership?

From Nate Werner - If a Christian man commits a sin in the past that would disqualify him from eldership (e.g. - looking at porn, but has since repented) is he forever disqualified? More generally, if a man did not meet the qualifications for eldership in the past, but now he does, is that man forever disqualified?