Buick 1994 LeSabre Owner's Manual page 255

Aluminum Wheels (If So Equipped)
Your aluminum wheels have a protective coating similar
to the painted surface of your car. Don't use strong
soaps, chemicals, chrome polish, abrasive cleaners or
abrasive cleaning brushes on them because you could
damage this coating. After rinsing thoroughly, a wax
may be applied.
NOTICE:
If you have aluminum wheels, don't use an
automatic vehicle wash that has hard silicon
carbide cleaning brushes. These brushes can
take off the protective coating.
White Sidewall Tires
Your Buick dealer has a GM White Sidewall Tire
Cleaner. You can use a stiff brush with the cleaner.
Weatherstrips
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth at least every six
months. During very cold, damp weather more frequent
application.may be required. (See "Recommended
Fluids & Lubricants'' in the Index.)
Sheet Metal Damage
If your vehicle is damaged and requires sheet metal
repair or replacement, make sure the body repair shop
applies anti-corrosion material to the parts repaired or
replaced to restore corrosion protection.
Foreign Material
Calcium chloride and other salts, ice melting agents,
road oil and tar, tree sap, bird droppings, chemicals from
industrial chimneys, and other foreign matter can
damage your vehicle's finish if they remain on painted
surfaces. Use cleaners that are marked safe for painted
surfaces to remove foreign matter.
Finish Damage
Any stone chips, fractures or deep scratches in the finish
should be repaired right away. Bare metal will corrode
quickly and may develop into a major repair expense.
Minor chips and scratches can be repaired with touch-up
materials available from your dealer or other service
outlets. Larger areas of finish damage can be corrected
in your dealer's body and paint shop.