Caution! Don't put anything on your guitar until you understand the properties of said product.
Where has common sense gone? If you read the application information and disclaimers on the product, you should be able to figure out what not to use where.
As to my reccomendation of acetone for cleaning metal parts, I'm assuming that you wouldn't use it on lacquered or plastic parts, since my post suggested using it on the textured surfaces of alum. necks. I got the information from someone with experience in automotive body repair who also happens to build steel guitars. I guess I wasn't considering somebody dumping the liquid on the guitar.
As far as lubing, I like the comment comparing this application to auto engines. Friction is the biggest enemy of adjacent moving metal parts and the resulting heat. Now some of you may be hot pickers, but I doubt you're gonna generate any significant heat in your mechanical components.
A small amount of any lube on the changer fingers and other moving parts within reasonable intervals is sufficient.
Do a little research on any product you are considering and just use a little common sense
