1993 Pontiac Bonneville Owner's Manual - Page 263

Service & Appearance Care Finish Care Occasional waxing or mild polishing of your Pontiac may be necessary to remove residue from the paint finish. You can get GM approved cleaning products from your dealer. (See the Index under Appearance Care.) Your Pontiac has a "basecoatl clearcoat paint finish. The clearcoat gives more depth and gloss to the colored basecoat. " Aluminum Wheels(IF so EQUIPPED) White Sidewall Tires Your aluminum wheels have a protective coating similar to the painted surface of your Pontiac. Don't use strong soaps, chemicals, chrome polish, or other abrasive cleaners on them because you could damage this coating. After rinsing thoroughly, a waxmay be applied. Your Pontiac dealer has a GM White Sidewall Tire Cleaner.You can use a stiff brush withit. Weatherstrips These are places where glass metal or meets rubber. Silicone grease there will make them last longer, seal better, and not squeak. Apply silicone grease with a clean cloth at least every six months. Machine compounding or aggressive polishing on a basecoatklearcoat paint finish may dull the finish or leave swirl marks. 262 If you have aluminum wheels, don't use an automatic vehicle wash that has hard silicon carbide cleaning brushes. These brushes can take off the protective coating. . _