I used to prep my arrows with a bore brush and acetone, and clean the brass inserts with acetone also.
Since I switched to the Big Jim's Quick Stik glue, I don't do any prep at all (unless I cut the shaft; then I will clean out the end of the shaft with acetone on a q-tip). I have glued in hundreds of brass inserts in both GT and Easton FMJ shafts, and have yet to lose a single one.
I use a propane torch. I put a field tip in the insert, hold the field point with a pair of pliers, and heat the insert in the torch flame. I also hold the glue up to the edge of the flame just enough to get it starting to melt, but not enough for it to burn. I then roll the inert in the glue, and insert it into the arrow. I then dip the arrow in water to cool everything down.
Bisch