Not sure of the question.
After sandblasting I epoxy, the whole car, two coats.
Then say the next night I'm doing the quarter after all body work is done I spray a coat of epoxy and it stays like that until the whole car is ready for 2K primer.
I scuff the epoxy with 180 by hand and apply the primer, block and re-prime as many times as necessary.
When done with primer I do spray another coat of epoxy as my final sealer coat before basing.
Perhaps overkill but that is how I do it and I hope I clarified for your question?