Interesting comment about aerosols. Try lubricating piano hinges with a traditional Fluid 3 can... You're wasting your time, really; the oil rarely penetrates, especially on re-painted control surfaces.
ISTM that new aircraft tend to be sprayed with the primer, then assembled, then the whole lot is sprayed with the base and then the lacquer.
The result looks "nice" (no chewed-up paint in screw heads, etc) but there is going to be hardly any lube inside the moving parts because it would interfere with the paint
There is also a much wider issue with using aerosol (or other liquid) lube when
grease (of the correct temperature range) should be used. Grease will easily make it from one Annual to the next, but the liquids are gone long before. It is always "the next owner" who faces the music... or maybe the present owner who treated his plane like his BMW and just dumped it at the dealer for each service.
Most maintenance companies do Annuals (and the 50hr checks too, if they do them) at a fixed price; say £2500 and £500 respectively. Obviously it is in their interest to do the minimum "standard" work and this definitely won't include dismantling, cleaning, and greasing e.g. control surface linkages. They just usually spray-lube them, leaving all the accumulated grime in there which makes for a nice grinding paste
I have never come across a maintenance company which does this right. If you use grease then the non-exposed linkage bearings need doing maybe only every 2 years. I pay extra to have this done.
Piper have the right idea by using nylon-lined self-lubricating piano hinge segments on some aircraft.
... and then the maintainance company sticks some lube in there which attracts the grime and quickly the hinges are trashed
Socata used PTFE sleeves hinge pins, which are a nice idea but don't work. They need to be kept very clean; any grime (which
will get picked up) just mucks them up. There are 4 pins which are £100 each, and the 4 hinges come to ~ £1000 for the set. The problem is that the diameter accuracy on the sleeves is necessarily crap (+/-0.3mm or so) so there is a lot of slop in there, even after you have just spent all the money having it all replaced (£1500+), and the slop creates rapid wear... there is a regime which kind of works, which involves replacing just the end 2 pins (£200) a few times over say 10 years, and replace all the rest every 10 years.
You can't beat stainless
pins in bronze bushes Even the thermal expansion coefficient is closely matched, which is relevant on high altitude flights.