Looking for any advice before I pull my passenger side exhaust maifold. I have this spray that freazes the studs that is supposed to crack the rust holding the nut and bolt together. I have never used it and poeple claim its very good. Have any of you here tried it? Do I still need something like Deep Creep to prevent a snapped stud? I am taking a common sense approach to this by taking my time with the removal and the forethought to replace the nuts with copper since they didnt have enough brass ones in stock.