mm writes:

Is it possible to get Liquid Wrench or the equivalent in quarts.

Don't be a sucker for "tiny can big label" marketing.

Liquid Wrench is just a petroleum distillate of about kerosene weight.
Gallons of (overpriced) kero at the paint store. Diesel fuel would be the
cheapest ready source of kerosene plus a few smelly additives.

I've never seen evidence that any of it really loosens nuts, although it
does lubricate them after they're loose.