Aston Martin DB 9 2010 Manual page 250

For best results, do not wash the vehicle in strong sunlight. Allow the
vehicle to cool before washing. Do not use household soaps or
detergents. Do not direct water hoses at full force around the door
and trunk lid seals.
When washing the vehicle, first hose it down first to remove all dust
and mud residue.
When dust and mud have been removed wash gently with a soft
sponge using cold or warm water with a mild neutral detergent as
directed by the detergent manufacturer. Rinse thoroughly with a hose
to remove all traces of soapy water. Finally dry with a chamois
leather, which should be rinsed regularly in clean water.
Wash and clean the vehicle's front grill in the same way as the paint
work, but make sure that the front grill is dried off completely leaving
no water droplets on the grill (wipe the front grill last using a chamois
leather): Chrome polish or other abrasive cleaners must not be used.
11.44
Aston Martin recommends the use of 'AUTOGLYM' vehicle care
products or preparations of similar reputable manufacture for adding
to the washing water. Make sure that the manufacture's instructions
are followed.
During the winter months, it is advisable to wash the vehicle more
frequently, paying particular attention to the underside to combat the
detrimental effects of any salt and sand contamination picked up
from treated roads.
To delay the onset of corrosion developing on the brake components
Aston Martin recommend that after washing this vehicle, the vehicle
should be driven a short distance to make sure that all the water and
washing product has dried off.
Road Wheels
To avoid possible damage to the alloy road wheels, wheel nuts &
wheel centre trims, from a build up of brake dust wash and clean the
alloy road wheels frequently, using a mild soapy water solution only.
Do not use chemical alloy road wheel cleaners, as they can often
have a high acid or alkaline content and could cause discolouration.
Always clean one wheel at a time and do not allow the cleaning
solution to dry on the wheel. Fully flush off with clean water.
Headlamp Lenses
Only use a mild soapy water solution when washing the Headlamp
Lenses. Do not use cleaning materials which contain solvents.
Cleaning materials which contain solvents, i.e. Tar remover, Petrol/
Gasoline, Waxes or Polishes, may damage the headlamp lens.