I used to use Breakfree CLP, its pretty good stuff. Now I use Corrosion X. If you get some just get the big bottle of Corrosion X. The Corrosion X for guns is the same thing, in a small bottle.
Eeezox is probably the best for long term storage.
I'd use it, but I wax my blued guns with Renaissance Wax, it works awesome.
"No free man shall ever be debarred the use of arms."- Thomas Jefferson