CITROEN 2 CV4 1975 Owner's Manual page 27

When setting off, apply the brakes a few times to dry out any water
on the brake linings.
Cleaning the Windows
The windows may be cleaned with alcohol or with special
commercial products. Silicone based products are not recommended.
Pivot the windscreen wiper blades to the front and clean them with
a little soapy water without putting pressure on the rubber edges.
Metal Decorative Components
Wash in suds or water to which a little detergent such as Teepol has
been added (2.5 to 3.0 cu. in. per gallon or 10 ro 15 ccm per litre),
preceded and followed by a thorough rinsing with clean water.
The embellishers in particular should be washed very often since, in
time, mud might damage the surface so that repolishing may
become necessary.
AFter drying with a chamois leather, it is recommended that a
product like "ABEL PROTEGE CHROME", or other proprietary
chrome-polishes, be applied as a protection for the polished metal
finish.
Spots of Tar on the Bodywork
These should be removed as soon as possible.
Do not scrape off and do not use petrol or a spot remover for cloth,
but a special tar remover, such as "ABEL", or other proprietary tar
removers.
Polishing the Paintwork
Polishing is not recommended for metallic paintwork, because of
the risk of rings appearing.
On the other hand, for non-metallic paintwork, it is recommended
to carry out polishing at the end of Winter. For this, the body must
be perfectly clean and dry.