REM OIL is pretty close to a 10 weight oil (penetrating oil). I'm not a fan, but still use it when in a crunch.
For cleaning, I see if a blast of compressed air (when available) will get the crud out. If not, a soak in Dawn dish soap followed by a good rinse usually gets them clean. Air blast to dry. Then it's lube with Militec (in the past, it was Breakfree CLP) with a post lube (after a few hours) clean towel wipe down to get up the excess lube.
If an uncoated blade, I sometimes use Renesance Wax on the blade (and shiny metal handle material). But that's generally long term storage.