Pontiac 1955 Owner's Manual page 52

The best cuts of leather have certain scars, horn marks, and briar
scratches. These likewise do not detract from quality or durability
but indicate that the hide carrying these "blemishes" is of the top
cut grade with entirely natural markings.
If dirt accumulates on the surface, this develops into a hard grit which
under pressure will cut the finish and cause the leather to crack or
bleed color. Whenever dirt accumulates, the surface should be cleaned
occasionally as follows:
1. Apply a thick suds of lukewarm water and a neutral soap worked
up on a piece of gauze or cheesecloth to the surface.
2. Wipe entire surface using only a damp cloth.
3. Wipe leather dry with a soft cloth.
Imitation Leathers — Imitation leather fabrics are used for auxiliary
trimming in conjunction with both fabric and genuine leather up
holsteries.
Recommended cleaning instructions for imitation leather are the
same as outlined for genuine leather and as in the case of genuine
leather one of the most important factors is the removal of soilage
as quickly as possible after it occurs.
NOTE: Polishes and cleaners used for auto body finishes, volatile and other
clear cleaners, naphtha, furniture polishes, oils, varnishes, or household
cleansing and bleaching agents should never be used, as they may perma
nently damage the surface finish of either the genuine or imitation leather
and mar the beauty of the car interior.
Convertible Top Materials—Generally, soilage can be removed
with art gum or crude rubber. If dirt is heavily embedded in the
fabric, the top should be thoroughly brushed with a whisk broom.
In this, brushing a minimum of pressure should be applied to those
areas of the assembly which cover the metal bows of the top struc
ture; heavy abrasion will disturb the surface of the material appre
ciably, causing an unsightly appearance. After brushing, the top
should be washed thoroughly with a neutral soap suds and lukewarm
water using a cloth or brush with soft bristles. Generous quantities
of clear water should then be applied over the surface to remove any
traces of soap which might remain. Never use volatile or other clear
cleaners.
After being wet by cleaning or by rain, the top should be allowed to
dry out thoroughly before being collapsed; the dampness may cause
mildew and wrinkles.
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