I want to put this to bed before misinformation spreads like wildfire. Here's the part the 2014 Owners manual that the OP is talking about. I'm not sure what they mean when they say aftermarket clearcoat sealant but it isn't just normal waxing.
Wax your cars, folks.
Finish Care
Application of aftermarket clearcoat
sealant/wax materials is not
recommended. If painted surfaces
are damaged, see your dealer to
have the damage assessed and
repaired. Foreign materials such as
calcium chloride and other salts, ice
melting agents, road oil and tar, tree
sap, bird droppings, chemicals from
industrial chimneys, etc., can
damage the vehicle's finish if they
remain on painted surfaces. Wash
the vehicle as soon as possible.
If necessary, use non-abrasive
cleaners that are marked safe for
painted surfaces to remove foreign
matter.
Occasional hand waxing or mild
polishing should be done to remove
residue from the paint finish. See
your dealer for approved cleaning
products.
Do not apply waxes or polishes to
uncoated plastic, vinyl, rubber,
decals, simulated wood, or flat paint
as damage can occur.
http://www.chevrolet.com/content/da...nuals and Videos/02_pdf/2k14sonic2ndprint.pdf
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