Porsche 928 S 1984 Owner's Manual page 61

To guard against corrosion from inside out,
clean drain holes on the bottom of doors, tail
gates hatches, etc., after each washing. Then
wipe dry thoroughly. Also inspect all weather-
strips to make sure they do not allow water to
enter the body panels.
Do not aim water jet directly at door, hatch
or rear lid locks. Tape the key holes to prevent
water from seeping into the lock cylinders.
Water in lock cylinders should be removed
with compressed air. To prevent locks from
freezing in the winter, squirt glycerine or lock
de-icer into the lock cylinders. Do not use any
solution that can damage the body paint.
The underside of the vehicle picks up dirt and
road salts used to keep streets and highways
free of snow and ice. To guard against corro-
sion, it is important to remove mud, debris and
road salt from the underside with a powerful
jet of water. Be sure to include the wheel hous-
ings, bumpers, muffler, tailpipe and brackets.
This should be done twice a year and is best
accomplished after the vehicle has been driven
through a heavy rain. Let engine and exhaust
cool down before washing.
Waxing is not really needed when you have
used a car-wash and wax solution. If you do
not use a car-wash liquid with wax, apply wax
to preserve the natural shine of the body paint.
To obtain a long lasting finish, apply hard wax.
Wax again if water remains on the surface in
large patches instead of forming beads and
rolling off.
58
Exterior
Care of the finish
Oils contained in the paint are the most im-
portant ingredients contributing to the elastic-
ity of the finish. Because these oils are gra-
dually lost, due to weather and similar causes,
they must be replenished through regular and
proper care of the finish. Given proper care,
the original finish will retain its luster for many
years. Ask your dealer for approved cleaning
agents and preservatives. The use of polishes
is recommended only after it becomes evident
that the normal preservatives no longer ac-
complish the job.
Dull finishes and plastics
Plastic parts, such as light bulb lenses, deco-
rative stripes, panels, etc., will come clean dur-
ing car washing. Should additional cleaning
or spot removal be necessary, use a soft brush
or cloth soaked with a mild detergent solution.
Then rinse thoroughly and immediately with
clear water. Do not use anything which could
mar the plastic or dull finishes surface, such
as wax or polish, abrasive detergents or chem-
ical cleaning solvents.
Metal trim
Bright or black anodized trim will come clean
when you wash the vehicle. To protect the trim,
use car wax.
Touch-up paint
Your dealer has touch-up paint for minor
scratches and stone chips. Scratches should
be touched up soon after they occur, to pre-
vent corrosion. If corrosion formation becomes
visible, however, a simple touch-up job will not
suffice. The affected surface must be smoothed
with sand paper and covered with an anti-
rust primer, before restoring the painted finish.
Tar or oil
Do not allow tar or oil to remain on the paint.
Remove as soon as possible with a cloth
soaked with a special paint cleaner. If you do
not have a tar or oil remover, you may sub-
stitute with turpentine. After applying a clean-
ing fluid, always wash with a lukewarm soap
water solution and apply a new wax coat.
Insects
Remove as soon as possible with a lukewarm
soap/water solution or apply insect remover.