Porsche Cayman Owner's Manual page 234

Door, lid and window seals
Wash dirt (e.g. abrasion, dust, road salts) from
all seals regularly using warm soapy water.
Do not use any chemical cleaning agents or
solvents.
When there is a frost hazard, the outer door seals
and the front and rear lid seals can be protected
against freezing into place by a suitable care
product.
In order to prevent damage to the anti-friction
coating, the inner door seals must not be
treated with care products.
Stainless steel exhaust tailpipes
Stainless steel exhaust tailpipes can discolor due
to soiling, strong heat, and combustion residues.
The original polish can be achieved again using
commercially available metal polishing paste or
metal polish.
232
Maintenance, Car Care
Headlights, lights, interior and exterior
plasticparts, adhesive lms
Use only clean water and a little dishwashing
detergent to clean light lenses, plastic
headlight lenses, plastic parts and surfaces.
Do not clean when dry. Use a soft sponge or
a soft, lint-free cloth. Gently wipe the surface
without applying too much pressure. The
Porsche inside window cleaner is also suitable
for cleaning plastic surfaces. Follow the
cleaning instructions on the container. Never
use other chemical cleaners or solvents.
Rinse cleaned surfaces with clear water.
Light alloy wheels
Please observe the chapter "WASHING" on
page 228.
Warning!
Danger of accident resulting in serious
personal injury or death if cleaning agents
(e.g. wheel cleaning agents) come into
contact with the brake discs. The resulting
lm on the brake discs can impair braking
performance.
Make sure that no cleaning agent comes into
contact with the brake discs.
If cleaning agent has come into contact with
the brake discs, thoroughly clean the brake
discs with a strong jet of water.
Paying attention to any road users behind you,
dry the brake discs by applying the brakes at
short intervals.
Pitting may occur if metallic particles which cause
contact corrosion (e.g. brass or copper in brake
dust) are allowed to remain on the aluminum for too
long.
If possible, wash the wheels with a sponge or
wash brush about every two weeks. In areas
where salt is spread on winter roads or there
is a lot of airborne industrial dust, it is best to
clean the wheels weekly. The Porsche Light
Alloy Wheel Cleaner (ph-value 9.5) can be
used for this purpose. If the ph-value of
the detergent is incorrect, the protective
coating on the wheels will be destroyed.
Polishes which dissolve oxides, such as those
frequently used for other metals, or abrasive
tools or agents are unsuitable because they
break down the oxide lm of the protective
coating and will cause discoloration of the
wheel.
Every three months, after cleaning, coat the
wheels with a car wax or non-corrosive grease
(vaseline).Using a clean cloth thoroughly rub
the grease into the surface.