I used Release many years ago (mid 90's), I got it from a mate of mine who was a school caretaker, and had loads of the stuff that he let me have for free, to clear his stock room out... Never found it anywhere else, but then this was the days before the interwebs..
I really like it, and thought it did a very good job, especially as in those days most cleaning was done with the solution in tank, and just using a porty with single vac motor, and low psi pump..
Goodness how times have changed... I suspect that with pre-spray and good agitation, it would be very good. So long as it was rinsed off properly....