Absolutely toss it and don't issue any guff about me being free with your money.
When products freeze or otherwise go bad one or another ingredient volatilizes away leaving some glop you won't be able to spread....or will harden in place...or will pull fibers from your rag and harden.
Get real (a little). Old, lumpy Anti-Seize can be thinned with any thin oil and the lumps messaged out.
Old paste shoe polish seems never to go bad even when it's cracked in the can.
Finish products-floor polish, paints, waxes and glues have ALWAYS been a different story.
An old Finnish guy I worked with used to say, "Buy a new bottle and one less beer today".
And believe me, I know...it'll take years for the sting of waste to wear off but you'll live. On the other hand, you'll feel like a big dippy-doo if you create a huge sticky mess somewhere on your car. Then you'll be asking for solvents to remove old Nu-Finish.
Try some on the bonnet of a lawn tractor or side of a metal garbage can if you're so tortured.