Cleaning The Convertible Top; Preservation - Porsche 928 ST1991 Owner's Manual

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Do not use the same chamois leather for dry-
ing as you use for cleaning the windshield
and windows.
The moisture which gets on to the brakes du-
ring a car wash can reduce braking efficiency
or make the brakes pull unevenly. Always ap-
ply the brakes a few times after washing the
car to test the braking efficiency and dry the
brake discs.
Dust should never be wiped off the car with a
dry cloth since dust particles are abrasive and
could dull and damage the surface finish.

Cleaning the convertible top

The life and appearance of your convertible
top are to a large extent dependent on proper
care and servicing.
Whenever possible, park your car in shade as
continuous sunshine will attack the top
material, rubber, and color.
Remove bird droppings immediately since
the acid in them will make the rubber swell
and the convertible top will become leaky.
The convertible top must only be opened and
stored when it is completely dry, otherwise
damp stains and scrub marks may occur
which cannot be removed.
Before washing, or if the convertible top is du-
sty, brush with a soft brush in the direction of
the line of the fabric. Clean rear window with
a soft, antistatic cloth or with the Porsche
spray-on window cleaning agent. The con-
vertible top does not have to be washed each
time the car is washed.
It is usually sufficient to spray or wash it with
clean water. Only if the convertible top is ex-
tremely dirty, wet with lukewarm soapy water
(e. g. washing agent for delicate fabrics) using
a sponge or soft brush and rub gently. Then
spray the convertible top with clean water un-
til there is no soapy solution left on it.
Avoid car washes. The brushes could cau-
se scratches on the rear window.
Do not affix stickers or adhesive strips to the
rear window or cover it with plastic film. This
causes discoloration and can damage the re-
ar window.
The convertible top must remain closed while
drying.
If leaks develop in the convertible top or at its
seams and folds, they can be rectified with an
impregnating agent approved by Porsche.
After treatment, remove any impregnating
agent from the rear window or the car's body.
Never clean the convertible top or rear win-
dow using kerosene, stain remover, gasoline,
paint thinner or solvent; they attack the layer
of rubber between the fabric and endanger
water-resistance and durability. Try to remove
the stains by rubbing carefully with a soft rub-
ber sponge.
Never remove snow and ice using a sharp
edged object. To de-ice rear window use
commercial de-icing spray.
Incorrect care and treatment can damage the
convertible top and cause leaks. Any repair
work can be done by your authorized Porsche
dealer.

Preservation

The paintwork contains certain oils which
maintain its high luster and prevent it from be-
coming brittle. Climatic influences can remove
these oils from the paintwork. This should be
counteracted by applying a paint preservative
early enough to restore the oils preserving the
high luster and preventing dirt from settling
on the surface and industrial dust penetrating
the paint.
Provided it is washed and treated with pre-
servative regularly, the brand new finish of
your car will be retained for years to come.
Apply the Porsche paint preservative after the
car wash and polish it dry to obtain a bright
finish or simply add the Porsche liquid pre-
servative regularly to the final rinse water and
rub down with a leather chamois.
33

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928 gt1991

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