I have a cell phone with a built-in camera. I rarely use the camera,
but when I want to use it I really want to use it, and I want it to
work. Alas the thing has lived in a pocket so long that the lens is
scratched. The scratches are numerous but not deep.
I know from putting a thin film of liquid on it that the scratches
are the dominant problem. I used ethanol because it goes on thin
and flat ... but it is not a permanent fix.
The relevant surface of the lens is supposed to be planar; the
curved surface of the lens is safe inside the device.
Options include
-- buffing out the scratches, in which case the question is what
tools and techniques to use, and what to use for buffing compound.
Mother's Plastic Polish?
-- filling the scratches, in which case the question is what to
use for a filler. Lemon Pledge?
-- buying a new phone.
-- perhaps some less-obvious options????