Is wd-40 specialist silicone appropriate for Rubik's Cubes?

Well try it.

The internet seems to suggest it works and wont damage the cube but leaves it feeling “nasty”.

Not clear what they mean by that and it may be something you have to be very familiar with how the cube works to notice.

The hardware store made me aware of a non-WD-40 silicone spray that is more effective because it doesn’t gather dust. The guy there suggested I use it on my sliding screen door rails.