1993 Oldsmobile Silhouette Owner's Manual - Page 263

Foreign Material Calcium chloride and other salts,ice melting agents, road oil and tar, tree sap, bird droppings, chemicals from industrial chimneys, andother foreign matter can damage your vehicle's finish if they remain on painted surfaces.Use cleaners that are marked safe for painted surfaces for these stains. Finish Damage Any stone chips, fracturesor deep scratches in the fmish should be repaired right away. Minor chips and scratches can be repaired with touch-up materials available from your dealer other or service outlets. Larger areasof finish damage can be corrected your in dealer's body and paint shop. Underbody Maintenance Chemicals used for ice and snow removal and dust control can collect on the underbody. If theseare not removed, accelerated corrosion (rust) can occur on the underbody parts such as fuel lines, frame, floor pan, and exhaust system even though they have corrosion protection. At least every spring, flush these materials from the underbody with plain water. Clean any areas where mud and other debris can collect. Dirt packed in closed areas of the frame should be loosened before being flushed. Your dealer or an underbody vehicle washing system can do this for you. 261