These days when you buy a new car, dealerships are offering options for paint, glass, wheel and interior coatings, and some come with a lifetime guarantee. This usually means the application of some type of sealant. These products help prevent light scratches and protect against harmful effects of the suns rays (fading), brake dust on the wheels, spills in the interior, etc.. The protectants are valuable if the proper prep is done to the car prior to application.
What you need to know is that a new car coming from the manufacturer should be defect free. The problem is that during transport, shipping and handling, the car is exposed to the elements and whatever washing/cleaning the dealerships provide. There is the chance that the paint can pick up contaminants and even minor scratches. If the "protectant" is applied over the contaminants/scratches, they will be visible. Many of the products the dealerships use are permanent and if you want to remove defects that were covered up, you have a very expensive proposition on your hands.
Before purchasing this option on a new car be sure and ask the dealer how/if they prep the paint - buffing, and removal of defects - prior to application. If they will not provide you with the right answer, contact a car detailer to provide the service. A reputable detailer will remove any defects from the paint and then apply a a coating for you. They can also treat the glass, wheels and interior for you as well. This is a safe way to go.
Secondly, the product coating companies advertise that "you never need to wax your car again. Just wash and see it shine." This may be true. However, I constantly get calls from people who say that the shine has lessened some since they bought the car and want a quality wax applied to bring out the color and make the car look new again.
Finally, your prized possession, the car you now own, can get the same paint, wheel, glass and wheel protection from your favorite detailer.
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