+1 On Birchwood Casey's Sheath. Not really a lubricant just a silicon spray that goes on wet but finishes dry and does an outstanding job of protecting metal from rust. It comes off with handling so its more for spraying down before it sits in the case, but way better then the military grease I used to coat things with for years.

+1 on SlideGlide and Militech teflon lube. I use Tetra-Gun myself, but its mostly all the same stuff. I put a small dap of the stuff on my fingers and work it on any moving surface that has metal-metal contact. A little bit goes a long way. I find it doesn't work itself off of parts like conventional oil and it seems to retain less powder residue. As far as the cold weather, well I'll tell you after this Sunday when I shoot Limited-10, its supposed to be well below freezing and my Springfield is caked in the stuff.

Overlubricate? I am not really sure thats possible, any excess oil or grease will work itself out of an automatic pretty fast. I guess I could see powder and gunk building up in the excess lube making it hard for it to work out and consequently bother the mechanical function of your weapon. With light oils like Hoppes Gun oil or RemOil the stuff is so light it just runs out all over and you are practically on bare metal anyways. The teflon variety works best for me from M-14s, pump shotguns and pistols. I alcohol the surfaces I intend to telfon-grease prior to application.

And for clean-up, I recommend Lube-Job. Its not nearly as nasty as Gun Scrubber and I have yet to find anything it couldn't get clean. Dirty dies, metal shavings where you didn't want them, powder residue, grease all just get carried away by the foam when this stuff jets from the bottle. Surfaces wipe dry, clean and mildly lubricated. Not a replacement for the brass brush, patches, Hoppes and Sweets for a heavily fouled barrel but works good for everything else. It's cheap to, a big WD-40 sized can is 7 bucks and lasts awhile.

The best penetrating oil in the universe is Kano Kroil. It will penetrate anything as small as 1 millionth of an inch. From rusted out wheel lugs to the idiot who used way too much of the wrong color loctite: this stuff will free anything up.

I could share a neat trick with transmission fluid and shotgun slugs but I think maybe I am getting off topic as it is...

-Mike