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What are Auto
Polishes?
One
of the attractions of a new car is its showroom shine.
But eventually sunlight, water, air pollution, and other
contaminates can age and erode the paint until the gloss fades, and the
finish is no longer able to shed contaminants.
At this point auto polish can make a dramatic improvement.
You will find auto polish in liquid, paste, and a few spray
versions. The products are
interchangeably labeled wax, polish, or sealants by their makers.
The one-step applications contain abrasives or solvents to remove
stubborn stains or oxidation from a car’s finish and waxes or cracks and
renew the water repellency of
the finish. Polishes are
either hand applied or professionally applied using a machine polishing
buffer with a foam or lambs’ wool buffing pad.
Effectiveness
On car
surfaces that are weathered, some polishes will shine better than others.
Yet, even the better ones won’t increase the gloss of a new car.
Some make new paint look worse by leaving scratches or haze.
For that reason, it is recommended that polishes be applied by a
detailing professional who is trained in the evaluation of paint
tolerance.
A major part of the sales appeal of auto polishes is the protection
they provide against the elements. But
a polish can’t protect anything once it has worn away.
People who polish their cars may not do it often enough.
If you want to see if a polish is holding up, look at what happens
to water on the car’s surface. The
beads of water that form on a protected surface are relatively small and
rounded and sit high on the surface.
As the polish wears away, the beads spread and flatten.
Eventually, when the polish is completely gone, water doesn’t
bead at all; it lies in a sheet on the surface.
Abrasiveness
The
paint, not the polish, protects a car’s metal from rust.
So it makes sense to polish away no more paint than necessary to
restore a smooth finish. Polishes should remove any oxidation or contaminants but
shouldn’t leave a haze or scratches.
On older cars that do not have a clear top coat, polish should not
remove much of the color.
A fine abrasive is useful for
removing stubborn stains or oxidation.
For an extremely weathered finish, however, even the most abrasive polish may not be adequate.
Special, highly abrasive polishing or rubbing compounds are available for such challenging jobs.
Their use is recommended only by automotive industry specialists because rubbing too long or too hard may rub right through the paint to the primer.
Recommendations
Whichever polish is used, the vehicle must be washed thoroughly
beforehand. Most road dirt is
a good deal harder than a car’s finish. Polishing a dirty car will grind the dirt into the paint, scratching the finish as you rub.
You may need to polish a new car, if one was not applied to the
clear coat as a dealer prep. Washing
a new car often is a must. Bird
and tree droppings, salt, tar, and even plain dirt can eventually mar the
finish. Frequent washing is
especially important in the summer, when high temperatures increase the
damaging effects of contaminants.
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