mattw,
Set the can of JPW in a pot with about 3/4" of water and very gently warm the JPW to liquid, squirt in the little 4 oz. bottle of Alox, stir, and you're done. Let cool.
No fussing about with cooking things out and squirting things back in. No chance of fire either.
I used it this way for a couple of years exclusively in everything I shot, approaching 1900fps. The only down side that I've found with it is eventually you need to wire brush the residue out after 100-150 rounds or so to keep accuracy at its best.