"I heard that GB Wire Aide ( Gardner/Bender) which can be bought at Lowe's for one place for about $5 a quart is the same thing as Lee's water soluble case lube"
I'm no chemist but I've done a LOT of experimention with commercial and substitute case lubes. Don't know if Lee and wire lube is the "same" but it sure seems so. And that means they are liquid soaps, much the same as any of the very expensive (comparatively) commerical water soluable lube. Such soaps can be thinned and sprayed but, if it gets too thin, the coating will be insufficent and cases will stick. Sprays are good for those loading hundreds of cases at a time, especially pistol cases.
Several auto oils and greases such as STP have great film strength and work fine as a case lube. Problem is, as stated above, it's hard to remove and it's messy to use. I hate the stuff!
Waxes do very well. Soft waxes are easy to apply with finger tips as the cases are picked up, easy to clean off and work very well. Imperial and Unique are good examples. Again as has been mentioned, Kiwi and other "Mink Oil" or "Sno-Proff" type boot treatments are equally as good. They are easy to find and inexpensive too. For loading small to modest quanities of cases I much prefer a finger applied wax to any other type lube, MUCH more prectical than attempting to mix up some magic potion of sticky oils and greases!
Some other things that also work pretty well: Chap-Stick; women's lip sticks (not all); any color of Kiwi, et al, shoe wax/polish' Johnson, et al, floor wax; stick auto door latch lube; stick circular saw blade lube; outboard motor "high pressure" greases; bar type hand soaps that contain high levels of lanolin; ...