I use Militec lubricant on all my pistols and carbines, altho I find FP-10 almost as good for pistols. I have never bothered with their hot-gun/hairdryer nonsense: clean it, lube it, carry it, shoot it - repeat sequence as needed. Never had any lubricant related problems with either Militec or FP-10 (altho Militec is a bit more persistent and therefore I like it better).
I wouldn't recommend using ANY grease on properly fitted, externally lubricated parts - this includes anywhere on the slide, the frame rails, the barrel or the recoil spring/guide. If you wanted to put some on the hammer/trigger bar internals go ahead, although I wouldn't recommend that particularly. There is just not enough heavy-duty stress on those parts with the Kel-Tec pistols to warrant the trouble. Grease attracts grime, dirt and particles, which act like a nice wet sandpaper when combined with grease. Not exactly what you want to do to your tolerances.
IMHO, grease is best used on internally-lubricated parts that are not subject to regular amounts of fouling and/or grime. And there are not too many of those on a firearm - the internals of a DA revolver come to mind as one example. But even then, the grease needs to be cleaned out and reapplied every so often - once a year is a good idea. The other use for grease is as a break-in on a tightly-fitted pistol, applied to the barrel lockup areas, slide rails, etc. In that case, the grease is cleaned out at every cleaning and reapplied.
Use the Militec, hide the grease, give the hairdryer back to your female half, and enjoy life.
