Any stone chips, fractures or deep scratches in the finish should be repaired right away. Bare metal will corrode quickly and may develop into major repair expense.
Minor chips and scratches can be repaired with touch-up materials available from your dealer/retailer.
Larger areas of finish damage can be corrected in your dealer's/retailer's body and paint shop.
Chevrolet Cobalt Owners Manual. Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 Traction AA
Temperature A
The following information relates to the system
developed by the United States National
Highway Traffic Safety Administratio ...