Alternative Chain Grease/Lube Can I use this general-purpose lithium grease on my chain until I can get some Finish Line lube?
Not ideal.  You need something that will penetrate into the chain, and grease will not readily do that.  If your chain really needs lubing and you can't get any proper chain oil then plain old engine oil would be a better choice.  ("Sewing machine oil"/3-in-One oil would be a second choice, but it's probably a hair too "light".)

The real bike maintenance nuts used to melt paraffin wax, beeswax, and kerosene together and soak their clean, dry chains in that.  This is essentially the lube applied at the factory.  But modern liquid chain lubes work as well with less trouble/mess.