Interesting topic indeed. If a race of human beings that have an Angelic DNA code were still around in our days the question would have to be asked; can they be saved? The answer is yes! If they repent just as a human being who does not have an Angelic DNA code. The race of half Angels have to receive salvation just as the rest of humanity. Can I prove it? Yes I can! They are born fallen just as we are born fallen, all need salvation and all can be saved. Colossians 1
King James Version 15Who is the image of the invisible God, the firstborn of every creature: 16For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him: 17And he is before all things, and by him all things consist. 18And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence. 19For it pleased the Father that in him should all fulness dwell; 20And, having made peace through the blood of his cross, by him to reconcile all things unto himself; by him, I say, whether they be things in earth, or things in heaven.

21And you, that were sometime alienated and enemies in your mind by wicked works, yet now hath he reconciled 22In the body of his flesh through death, to present you holy and unblameable and unreproveable in his sight: 23If ye continue in the faith grounded and settled, and be not moved away from the hope of the gospel, which ye have heard, and which was preached to every creature which is under heaven; whereof I Paul am made a minister; The Spirit of God has impressed this scripture ; and which was preached to every creature which is under heaven