The issue of when the blood is applied is a hairy one. It gets into all sorts of confusion, I think. So I do not use it.
For instance, since the blood was applied to the three posts of the Hebrew doors in Goshen during Passover, some say there is a three-fold application to denote repentance, baptism and Spirit infilling. No one stepper would agree with that. I would be called a three stepper, but I do not agree with that correlation either. However, that is the sort of can of worms one opens when one discusses when the blood is applied, when the New Testament does not use that terminology. Since it is not used, then neither sides of the steppers' views are proposed in relation to it.
We do read of BLOOD SHEDDING and BLOOD SPRINKLING. And that is another category altogether, though. Sprinkling of the blood occurs on thy human conscience and depicts a changing process of coming to full assurance of faith in
Hebrews 9 - 10, after salvation.