1998 Chevrolet Express Van Owner's Manual - Page 296

Cleaning Tires To clean your tires, use a stiff brush with tire cleaner. a Sheet Metal Damage If your vehicle isdamaged 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. NOTICE: When applying a tire dressing always take care to wipe off any overspray or splash from all painted surfaces on the body wheels of the or vehicle. Petroleum-based products may damage the paint finish. Finish Damage Any stone chips, fractures or deepscratches in the finish should be repaired right away.Bare metal will corrode quickly and maydevelop into a majorrepair expense. Minor chips and scratches can be repaired withtouch-up materials available from your dealer or other service outlets. Larger areas of finish damage can be corrected in your dealer's body and paint shop.