I wouldn't. Growing up, this was not uncommon for chicken fried in grease to go through one more round of frying. But what I have learned is the flour that has come off of the previous batch of chicken is still in there and will burn in the oil, leaving a not-so-good taste. Now, if you are desperate, I suppose you can strain the oil to get rid of excess crumbs and flour. I have not done this, but if you do and it works, let me know.