Honda Prelude 1990 Online Reference Owner's Manual page 111

Washing
NOTE:
Retract the headlights before washing the car. However, make sure
the headlight lenses are cleaned periodically.
Rinse all loose dirt off the car by spraying it with lukewarm or cold
water. Do not use hot water.
Wash using a soft bristle brush, sponge, or cloth with water
containing a mild detergent, such as a liquid dishwashing detergent.
Remove oil, tar, tree sap, etc., with tar remover or turpentine.
Remove road salt, insects, etc., with mild detergent and lukewarm
water. Any of these substances may damage the finish if left on
painted surfaces.
Rinse the car well. Promptly wipe with a chamois or soft towel to
prevent water-spotting. Do not let water or soap air-dry on painted
surfaces.
During wiping, inspect the surface for stone chips and scratches;
paint them with touch-up paint so they won't rust (touch-up paint
is available through your Honda dealer).
For further instructions on corrosion protection, refer to the Rust
Prevention section on page 112.
Aluminum Alloy Wheels (Si with 4 W S or ALB)
CAUTION:
Wash the wheels after driving on snowy or icy roads where salt
has been applied.
Avoid off-road driving. Brush, rocks, dirt and severe impact may
damage the wheels.
Install tire chains carefully. Improperly installed chains can cause
damage to the wheels.
Honda aluminum alloy wheels are treated with a protective
finish. Wash them with a low-phosphate detergent and sponge.
Do not use abrasive cleaners or stiff brushes.
Always install aluminum wheels in sets of four. If mixed with
other types, the car's handing may be affected.
(cont'd)