1998 Buick Park Avenue Owner's Manual - Page 335

If your vehicle is damaged and requires sheet metal repair or replacement, make sure the body repair shop applies anti-corrosion material to the parts repaired or replaced to restore corrosion protection. At least every spring, Rush these materials from the underbody with plain water. Clean any areas where mud and other debris can collect. Dirt packed in ciosed areas of the frame should be loosened before being flushed. Your dealer or an underbody car washing system cando this for you. Any stone chips, fractures or deep scratches in the finish should be repaired right away. Bare metal will corrode quickly and may develop into a major repair expense. Minor chips and scratches can be repaired with IOUCR-UP materials available from your dealer or other service outlets. Larger areas of finish damage canbe corrected in your dealer's body and paint shop. Some weather and atmospheric conditions can create a chemical fallout. Airborne pollutants can fail upon and a t t x k painted surfaces on your vehicle. This damage can take two forms: blotchy, ringlet-shaped discolorations, and small irregular dark spots etched into the paint surface. Although no defect in the paint job causes this, Buick will repair, at no charge to the owner, the surfaces of new vehicles damaged by this fallout condition within I 2 months o r 12,000 miles (20 000 km) of ourchase, whichever C C C U ~ Sfirst. Chemicals used €orice and snow removal and dust control can collect on the underbody. If these are not removed, accelerated corrosion (rustj can occur on the underbody parts such as fuel lines, frame, floor pan and exhaust system even though they have corrosion protection.