I started the muzzle down thing years ago with my muzzleloaders, only that was to keep the oil/lube from running down into the breech and creating ignition problems. But I've read of old timers doing the same for centerfire rifles to keep the stocks from getting oil soaked. But it also works well to keep the latch dry on a Handi which is imperative for good accuracy.
Eezox isn't easy to find, the one store that sold it here closed, so I have to buy it online, but Breakfree CLP is a good one and available just about everywhere, so I wouldn't hesitate to use it instead, and it smells better!!
Rog, just turn the gun vault upside down!!
Tim